Bash script start service if not running. lock and only run the script if it does not exist.

Bash script start service if not running Quote ref[3]: "network-online. You can just use it like: python python_file. While -P is a nonstandard option, both the GNU (Linux) and macOS/BSD implementations support it. 04: #!/bin/bash # Script to check if fail2ban service is running if pgrep -x "fail2ban" > /dev/null then echo "Fail2ban is running" else echo "Fail2ban is not running" fi I have installed fail2ban in a test VM and is running on the VM. restart the cron service I have used a simple script with cron to make sure that the program is running. Here how it should look like: IF 'java' process is not running THEN run . Shell simply looks for commands in (To store the script in my home folder. Often, one easy way to fix this is to write a little bash script that sources e. Running on Centos 7. so that I can have my script take the appropriate action if it fails (e. When I run: ps x |grep -v grep |grep -c "processname" I will get: 2 This is normal as the process runs with a recovery process. Reply. json like so "scripts": { "start": "node index. But I should launch this script only if it is not running already. sh When you use bash instead of source, the script cannot alter environment of the parent script. sh # execute the script from the directory it is in > . ) ) ) ) This is not sending the email as "Sendmail is not recognised as an internal or external command, operable command or batch file" a service that supports interactive commands would be ideal. It works when running directly. Part of this script, is following code: if [ ! "$(which google-drive-ocamlfuse)" ] then echo "Install google-drive-ocamlfuse first!" exit 1 fi systemctl has an is-active subcommand for this:. If I run "sudo systemctl status status-email. service file since I keep getting (code=exited, status=1/FAILURE) errors. sh". Improve this question. for /F "tokens=3 delims=: " %%H in ('sc query "MyServiceName" ^| findstr " So you want to start the service if its not running, if so then what about only starting the service everytime via systemctl, as systemctl already desinged to start the stopped services and do nothing if service is already running. if it is not running, do Here is a simple script that will check if your specified service is running and will start it if it’s stopped. Here's the sequence of events: Script launches background command. echo "Not a good time to transcode video!" && exit 0 You can try trapping the exit signal so that when the script exits it restarts I need to call systemctl start myservice near the end of a Bash script, but I really don't care about whether it will be successful or when it intends to return. sh CMD [". This is menu driven one stop shell script in which you can check the firewall,apache or any other webservices ,you can The systemd unit file is 11 lines long. service sudo systemctl stop my_script. /start. First, as @RameshNaidu pointed out, inside [[ < ]] is doing string comparison (i. lock and only run the script if it does not exist. bash; debian; The bash script is running in the same directory as the mail. Is anything wrong with how I set up my *. The . Typical services (those having and started with a single server process) are writing their PID (as an ASCII number on a single line) in some /var/run/foobar. pid file at their startup. I start the machines using the command wsl --distribution Ubuntu-20. g. txt file. In effect I want to run a script no matter how the service fails. The following example: runs at most 3 commands in parallel at a time,; with additional commands starting only when a previously launched process terminates. You place the command in your crontab and it can run as often as once per minute. After this service successfully starts it prints "Server is active" to the stdout. sh # to see the list of Hi @Mike_Q In my tests I could not make it work, your code is far above the simple proposal of mine, just to extract the value of pid to a format that is comparable to 0, with my code I understand I can do several things, like mysql , php-fpm too, but I could not get your code working with nginx. service (it still says success and no chromium window) – It also can be run by exporting the bash and sh of gitbash C:\Program Files\git\bin\ to Windows' environmental variables. Cron runs this script every 5 minutes. To use it, the first instance, (and all further attempts), should be started with something like: watershed You can configure various options in the [Service] section. sh or sh shellscript. (eg: cd /path/to/test. ; Make sure there is a / I see multiple issues: 1) X utilities need a DISPLAY to act upon; it's a variable set in the environment of the user(s) who are running an X instance, it's not available to a system systemd unit. service Description: reduce superfluous executions of idempotent command watershed may be run around a command such that any further attempts to run the command while another copy is running will only result in one initial further attempt. I use crontab to check it #!/bin/bash if [ "$(pidof java)" ] then # process was found echo "application running" else # process not found cd /home/assist/emanager setsid java -jar emanager-1. Needless to say, yours isn't among them. code: import os os. " else echo "Process is not running. Save the below script To fix that, look for pid files created by those services, and use them to check if the service is still running or not. Shell displays the prompt. process. I. To add it to your startup, you have to tell Ubuntu about it: sudo update-rc. ; You must not have spaces around the = sign when you assign a variable (this causes your grep to fail). running at the top of you script and. As per the desktop not being fully up and running, there is a 20 second delay and regardless, it's moot because still no dice when I manually run the service with sudo systemctl start kiosk. When you run the second command in the bash script, it is still in the AppAFolder and AppBfolder does not exist in the folder. You have answered an entirely different question. [2022-07-12--01-46-15] Netman service status is Stopped, attempting to Start. Fideloper LLC. /hls. Killing the server (running on port 3030 ) manually works. Example: Manual execution of the script works. Is it possible that the script triggers something that causes the service to exit? – If I remove the command: /bin/bash -c ". My problem is, with . If the process is running, it should do nothing. Also, on the lines with the continuation characters you're redirecting stderr to /dev/null which is why you @digfish, "didn't work" is, again, pretty uselessly vague -- it doesn't distinguish between the config file not being read by systemd at all, the file being read but rejected or overridden, the config file being read and its contents being parsed but the script it triggers not working right, and other possible variants. Most often it is proc is running but, for instance, php5-fpm returns php5-fpm start/running or php5-fpm stop/waiting – The problem is when I issue command #service hamonitor start, it says "Starting hamonitor", but I never see the OK message and if I issue the stop command, it fails and if I issue the status command, it says it is not running. Please Help. The PIDFile should not be affected by the ExecStartPost. sh & but See this similar stackoverflow question. another_script. sudo systemctl status shellscript. /sleep. service file – han solo There are a couple of problems here. But if you are really interested in a bash script, then you can do something like this, but keep in mind there is might be However, when the command is in a form that nohup won't accept then I run it through bash -c "". sh to test if java process is running, I can make this test: ps -A | grep java This script should run every minute (I guess in a CRON) Regards to run a nodejs script you generally run. The output of the sc commands is thrown away. For example: [user@localhost ~]$ pgrep -f /sbin/init 1 [user@localhost ~]$ It will return nothing if the file is not associated with a process. service". Bash commands to check running process: pgrep command – Looks through the currently running bash processes on Linux and lists the process IDs (PID) on screen. service file (meaning, run the Bash script), while. If you must know - I am not using etc/init. d is not sufficient to have it run at startup. The script is available on GitHub; the version at time of writing is here: or keep a CMD in exec form (which is often a good idea), but ensure the first argument of the JSON array is a program, not a composite command. xargs -P <n> allows you to run <n> commands in parallel. Tell the system the location of the script. So far so good. log file. The bigger picture. check ps -ef | grep httpd, kill if any hanged processes service httpd start If you have 'flock(1)' (which comes with util-linux in debian/Ubuntu etc) definitely use it. If your script It's a convention so the *nix shell knows what kind of interpreter to run. pidfile. [2022-07-11--23-27-53] Netman service status is Stopped after 3 Start attempts. Commands won't be overridden. sh, I get my processes running in the background, but the git-bash instance disowns them, now I can no longer see them using jobs. Bash script wait if already running, then continue. The command sudo journalctl -u elastalert. Further reading. If you adopt such a convention in your service, you can read that file using fscanf then check that the This script takes the service name as the first (and only) parameter, or you can hardcode it into the SVC_NAME assignment. sh <-- Don't wait for this to return. sh or . log to verify that what the output really is. "/sbin/service apache2 status" will show if the service is start or stop. My script is not running Your grep command fails, and myApp isn't found in the path you give. #!/bin/bash # A simple script echo " -- Restarting Supervisord --" sudo service supervisor stop sudo service supervisor start echo "Done!" when I run this manually via. In your case, you could do something I have a simple script as below which checks if fail2ban service is running or not on Ubuntu 18. The closest half solution I can think of is touch /tmp/nodescript. /script. /script arg1 arg2 > script. My script should return as quickly as possible, no matter whether that service has completed starting, I'm not depending on that. sh: command not found How can I fix this problem? Most programs are written with the other way in mind (even in pre-systemd days). Remember to run with bash and not with sh. Setting Up Mailcatcher. I want to ensure that service abc is running, and if not, start it. I use these scripts to manually start and stop my Node. (pick one) # type the name of the script with the full path > /path/to/script. Any ideas why this is happening? Thanks I'm trying to write a script that will check if a process is running, and if not, start it. Systemd services at boot. write a test string to the mycommand. In addition to using . Follow answered Dec 6, Then add the bootom of the script i made run include the start application at the bottom. timer to activate the . @ArikRundquist I have updated my answer with references. This may not be the perfect solution you are looking for, but it is simple and works rather well. Generally, this type of question is off-topic for Stack Overflow. myscript: 5: myscript: 0: not found running on ubuntu 12. I have a process that fails regularly & sometimes starts duplicate instances. And the confusing thing is that sometimes it says 'inactive' and #For a BASH script /bin/sh TheNameOfYourScript. Hope this gives you some clues. out" & stdout from the script gets written to script. sh will give you (the owner) exececute permissions, in addition to Everyone just forgot disown. But, if I check the logs, it shows that the script is in fact running. The nosh run script is 6. It totally works when I use: bash myshellscrip. 2014-10-21. I'd expect that to still work. source another_script. /install. 1425. /simple_script. 0. i usually use this bash script to check if my java application is running and start it again if not. [boot] command="ping 10. service, \ /bin/systemctl start myservice. Also, there is this: something. service is not a native service, redirecting to systemd-sysv-install. 0. Ashutosh Joshi 25/06/2019 at Now enable the service to start on system boot, also start the service using the following commands. That way i could execute 'fan status' and have it readout the the current status. The upstart job file is 8 lines. sh) How to do that? I have a script which normally i run using . The oneshot type means that the service should perform a single task and exit;; ExecStop – set the command to be executed when the service stops. Your command would be like below : Is it possible to start the execution of a command and not wait for it to return before continuing. sh" line everything works correctly (but wget is not installed). jar </dev/zero &>/dev/null & fi @EladMaimoni, bash . sh is running or not. On an Amazon S3 Linux instance, I have two scripts called start_my_app and stop_my_app which start and stop forever (which in turn runs my Node. Even today (where most systems run bash, the "Bourne Again Shell"), scripts can be in bash, python, perl, ruby, PHP, etc, etc. sh on I am attempting to start the service using "sudo sytemctl start status-email. log 2>&1 save and close then check the content in the /tmp/mycommand. sh, as DisplayName said, make sure your script is executable. Open the service and under the Recovery tab change the First, Second and Subsequent failures to Restart the Service. service does not appear to be able to execute the bash script hls. What i'm doing w Skip to main content. If the command is already running, flock will give up after 1 sec, and will not run the command, otherwise, it will obtain the lock and start the command. js application. I need to create a SSH BASH script (on Debian linux) to test if 'java' process is running. Example 3: Start a service and record the action in a text file If a Start-Service command fails with the message Cannot start service \<service-name\> on computer, use Get-CimInstance to find the start type of the service ENTRYPOINT "put your code here" && /bin/bash #exemple ENTRYPOINT service nginx start && service ssh start &&/bin/bash "use && to separate your code" Share. I know it was kinda dumb. sh 70 21187 bash /some/other/script. Packages that you install from apt-get/Software Center run this command or its equivalent for you What you want to do is built into the Windows Service already. So here is a summary: & puts the job in the background. sudo systemctl daemon-reload sudo systemctl start my_script. py, plain and simple. Share. Will try up to 3 times. by running chmod 755 beforehand, at build time: ADD login. service also does not show anything. There are sometime just bad instances when my script would break because of reason not in my control. /supervisord_restart. service httpd stop --wait 10 seconds. Permissions set to 777. I need to make sure only one instance of my script is #!/bin/bash echo "hello this is a bash script talking" >/dev/tty I've also tested a bash script with just a simple rm command, just to check if it was just the echo command that was having a problem. sh"] For more information on the CMD command and its brother command Although bash seems to supply the actual path that it uses to locate the script, that is AFAIK a design decision by bash and not anything specified by POSIX. just a simple one. Its code is simple (do_every_5_segons. Some units can be active even though nothing is Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company I'm not sure how portable it is across operating systems, but you might check if your system contains the 'run-one' command, i. In Centos replace with httpd. partial paths must not start with / and each component specified must be complete. I don't like an idea to create a systemd startup script for each app so I just run them from a bash script as following: The service: startup. service noslenkwah ALL = (root) NOPASSWD: MYSERVICE In this post, we will create a script that checks for the status of the service and start it if not running and execute the script periodically using the CRON job. if the service is already running, restart it. This is what systemd is for. (Ie, change "sleep. sh executable and adding shell=True to the parameter list (as suggested in previous answers) works ok. The traditional approach to parameterizing startup scripts is to put the information in a known file, normally in /etc, and reference that file in the script. If it's not, use chmod to change the permissions. I want this script to be running 24/7. node index. sh) while true do {read what is the best way to start a script in boot time on linux. The problem is that if I kill the server process the bash script also gets terminated. It wasn't the best choice though. 1. out) &> time_n_err. sh and I am able to also run the service if I do sudo service tv start but the tv. Additionally, you'll want to I have custom script to mount google drives. sh And I get the result that I want which is doing some tasks and sending emails to some correspondents. sh /opt RUN chmod 755 login. Makes it block on attempting to read input, and; Makes the shell not wait for its completion. When I run the script from the CLI, I have a trap ctrl_c INT function that runs when I hit ctrl+c to stop the script. But apparently /tmp doesn't (always) get cleaned on a server crash/reboot. Unless you took steps to prevent it (or unless this is what you actually wanted) you'd have ended up Not only that, but the service manpage specifically lists the environment variables a script will start with. You have to press enter or ctrl + c to get back to the command prompt. So when required, we just run the script to start the services and to stop services we again run the script. sh)which is already inside container from the above given shell script. I have a customised linux version, kernel version is 4. James Hunt and Clint Byrum (2014 Word choice is slightly misleading here. bashrc file, it doesn't delete the test. txt in the same directory as the script. After running the script each time, the script does not return to the command prompt. sh" to ". If the container EXISTS but is not running, docker start will start it, otherwise it docker run creates and starts it in one go. I will put this script in cron to run daily so if sidekiq is not running, it will start automatically. I tried editing cron jobs with crontab -e but this does not work because of the reason mentioned in the top. pid. – matpen. Subject to what your bash script does and what it needs. alphabetical order) rather than numeric, and that's causing trouble. Have a run through the troubleshooting tips from the Stack Overflow crontab tag wiki. ) sudo chmod +x <path> sudo chmod 755 <filename> However, whenever I go to the terminal to execute the Bash script, I get: $ sudo deploy-site. From the output above, we can see the process 21772 seems to be an instance of our task, as its command-line contains the name of our script. more commands Run shell command and don't wait for return [duplicate] Ask Question Aborting a shell script if any command returns a non-zero value. if [[ -f /tmp/myscript. This is how you should do it: # Wait for notepad to start until pids=$(pidof notepad) do sleep 1 done # Notepad has now started. Script exits. /etc/profile gets run whenever any user logs in, whenever a user opens a new terminal in the desktop, when sudo or su is used with the --login option, etc. 04 and i kill them using wsl then an idea popped up. For example, older flavors of ATT defaulted to sh (the Bourne shell), while older versions of BSD defaulted to csh (the C shell). Technically, although its familiar and backward compat, it's confusing and fragmented on modern installs -- not symlinked in a systemd way, I'm trying to start a service over ssh in a bash script that I just call from the command line. Thus, the only syntax that could be possibly pertinent is that of the first line (the "shebang"), which should look like #!/usr/bin/env bash, or #!/bin/bash, or similar depending @Hamzahfrq: Here's how it works: The script first checks to see if the PID file exists ("[ -e "${PIDFILE}" ]". ; pidof command – Find the process ID of a running program on Linux or Unix-like system; ps command – Get information about the currently running Linux or I want to setup a script which will connect to a linux server and then stop/start a service. Specifically, this set of commands includes 'run-one-constantly', which seems to be exactly what is needed. / or some other appropriate path. Here is a simple script that will check if your specified service is running and will start it if it’s stopped. running this as a one-off command will re-initialize the variables at the top, then report those variables, instead of the last ones set. I there a way to run a bash script starting from a specific line? Assume my script looks like that: 0 #!/bin/bash 1 2 clone a repository 3 4 command that crashed I go and fix line 4 and I want to rerun the script without running the code from lines 1,2,3 but starting directly from line 4. The autossh -f option puts it in background, so it's doing the opposite of what you want. For example, you might see Your script restart. out, while stderr and the output of time goes into time_n_err. Problems/fixes in your script: Don't put a space between #! and /bin/sh. d css-servers defaults It should then start on next boot, if the script is properly formatted, executable bit set, etc. To run it with npm you have to add it as a script in the package. Note that pidtree is called with $$ which is the PID of the bash script that is exiting and the list of PIDs (one per line) is So, let’s dive in and start mastering bash scripts! TL;DR: How Do I Run a Bash Script? To run a bash script in a Unix-like operating system, you use the bash command followed by the script name with the syntax, bash I need a script to check if the services are running or not, if its not running, and dont exist the flag, start all services. systemctl is-active --quiet service will exit with status zero if service is active, non-zero otherwise, making it ideal for scripts:. Restart Powershell and then run the shell file as. js application). #!/bin/bash #make-run. If I get 0 I will want to start the process if I get: 4 I will want to stop & restart the process What I need is a way of taking the result of ps x |grep -v grep |grep -c Just having the script present in /etc/init. py") But I'm not sure how to check if this script is already running or not. 15-klk my platform architecture is armv7l GNU/Linux I am trying to check if my process is running or not : I tried this: #!/bin/sh service= A: To "execute this script" from the terminal on a Unix/Linux type system, you have to do three things: 1. The script executes after boot automatically but the command sudo systemctl stop elastalert. Then I rebooted, so the system recognizes it. sh command. 2) X utilities will likely fail until the graphical environment is up and running for the user that runs them, which will most likely only happen at a later moment than multi-user. /login. Set the Restart service after to 2 minutes, so it has time to recover if there is an actual issue. I created a bash script . This still has a few potential problems (such as a race condition at the top) but will do for the vast majority of cases. I can do the following commands: (I have ssh keys in place so I don't need to put a p/w in) ssh -t -t user@server 'sudo /sbin/service test stop' -- Works fine, stops the service Agree, but I would like to avoid having to first find out if the service exists at all but ideally just one command that says "the service does not exist or is not running". I've also tried using backticks and quoting various parts of the command. log | wc -l) -gt 0 ] and then inspect ~/service. The echo piped through wall only exists for debugging. sudo systemctl start p. You probably need to move up a folder first before running the second command. I just need to start the action. sh > /dev/null & The better way to do this would be to create a Daemon via Upstart: start: this will start a service, if it's not running. For example, chmod 755 serverloadtest. disown removes the process from the shell's job control, but it still leaves it connected to the terminal. sh script in the PATH if it isn't in the current dir. The WhatIf parameter causes the cmdlet to display what would happen when you run the command but does not make changes. Perhaps there's some other simple way I'm not aware of. It can start the service automatically and keep track of it, and it can react when it dies. My problem: I also want to set it up such that start_my_app is run whenever the system boots up. In order for your changes applied in your script to have effect for the global environment the script has to be run with . I know that I need to It just seems that they do because the background command writes text to the console after the prompt. service . ps -aux | grep sidekiq One common problem with running commands from CRON is that the environment is not identical to that in a login shell. The startup scripts on most Linux distributions handle this, by saving the Process ID of the service (daemon) when they launch it. i am using below command to run script nohup system_traps. How to wait until everything started by a What is the linux command to find if a process say aa. running ]] ; then exit fi touch /tmp/myscript. when the services are down, the script dont start the services bash; awk; Share. E. How do I run a bash script if a systemd controlled service fails to start or restart? Similarly if a service suddenly stops and cannot continue. service activates the . How can I get the same functionality using systemctl? Definitely not something you want when you are running a script via an IDE. service I would like the script to "die" gracefully. Why a complex script required to I've a bash-script that starts some service in background. I know how to do this manually, with $ service [service_name] status. The comman pgrep -f <file> will return the number of current instances of the specified file. It's others' task to monitor the status of that service. service file but perhaps not. "man run-one". What works: 1) I can run the script (healthcheck. Thanks. This run of the script will not continue trying to Start the service. systemctl is-active --quiet service && echo Service is running If you omit --quiet it will also output the current status to its standard output. EDIT. Otherwise it will just skip and do nothing. myscript. I'm getting started with bash scripting and made this little script following along a short guide but for some reason when I run the script with sh myscript I get . From man page: run-one-constantly COMMAND [ARGS] I have a service that should run set of applications in background on my Yocto embedded Linux system. And they do all of the start/stop/status mechanics for you. it doesn't wait for the condition to become true, and then run the loop. (I prefer source over . Log files are produced when a service is found to not be running (updated 16/05) If the service isn't running, it attempts to start it - and produces a log file to capture the incident. Conventionally, and in years past on non-Linux systems, if you typed "script" on the command line, then argv[0] (aka $0 in the script) was just "script". sudo systemctl restart p. ~/. ps command does not seem to work and it does not show the shell script names. Finally verify the script is up and running as a systemd service. using bash it is starting, but when we close the terminal, forever is also terminating. so you can fix with new if else with real return value from bash script not from terminal. ; The variable should be quoted in the grep command, in case the name has a space. For example on my system Apache2 stores it original or parent process ID (useful for pre-forked processes) in /var/run/apache2. py file in the testpy-output. " fi To check if sidekiq process is running or not. Background command continues running and writing text to the console. sh. js Replace index. Simply running (if) pidof node won't work, because there might be other unrelated node scripts running. sh Making sleep. sh works too, and is actually preferable, because, unlike bash simple_script. sh or. I was using forever to run this application. : Type – defines the type of service. sh will give you read/write/exec permissions and others read/exec permissions, or chmod u+x serverloadtest. However when added to start up applications or . 04 I need to do this from time to time and end up hacking the command line until it works. ). AFAICT, POSIX 2008 did not change ) else ( SendMail /smtpserver localhost /to [email protected] /from [email protected] /subject Service Autostart Notification /body Autostart on service %service% failed. I know how to do it. sh #make sure a process is always running. If a service isn't running, the script sent a message to my rocketchat app via webhook like this: #!/bin/sh # Shell scr As mentioned in the comment, the better way to do that follow running-a-java-process-from-systemd. Don't start with System V rc, especially not on Ubuntu Linux. However, you generally shouldn't pass a shell script with a shebang line to a specific shell for direct execution, unless Windows Server: A family of Microsoft server operating systems that support enterprise-level management, data storage, applications, and communications. See How can I check to see if my game server is still running for other solutions. apachectl -D FOREGROUND. How can I determine if a process is running or not and then have a bash script execute some stuff based on that condition? For example: if process abc is running, do this. running at the end, and in trap functions in case it doesn't reach the end. I have a socket application, which is created in node js. target I am running the following script to check if my docker services are running. sh start does start the script!! When you run your bash script, the first command will change directory to AppAFolder. sh use the systemctl command, which is part of systemd; because this command needs root rights due to his role, you need to use the sudo command to be able to use it (and your user must be refered in sudoers as an authorized sudo user). py and add multiple command-line arguments at run time to the python file. thanks, thats great, was wondering if there is some flag or any simpler way not too different from running script again, will not require to document long commands, in your comment did you mean N lines?. If you have a command in current working directory that happens to have same name as a the one living in system directories, say echo for example, the one in your directory will be used simply because that directory is set in PATH variable before the /bin. command is POSIX standard while source command is a more readable bash synonym for . Drop that option and this should work. time xargs -P 3 -I {} sh -c 'eval Start myservice; The bash script I have created looks something like this: It won't need any password then when systemctl stop/start myservice. If the PID file instead does exist, then the script will check your own processes ("ps -u $(whoami) -opid=") and see if you're running one with This script runs via Windows Task Scheduler and accepts one or more service names. batterylevel-warning. Due to some reason, forever is stopping automatically. I'm trying to run a bash script on startup as a systemd service, I'm doing this on a Raspberry Pi 4 with Raspbian Buster Lite. How to start a Linux service (Bash script) containing an infinite loop in the start method. bash shellscript. abc is my script. The script is supposed to switch (su) to the username, cd to a specific directory based upon the project string. The "fuller" the path specified, the lower the risk of false positives. /myscript. The "exists but stopped" part is missing in VonC's answer. (Again example is for Ubuntu shell) #/bin/bash preventSubshell(){ if [[ $_ != $0 ]] then echo "Script is being I'm running Debian 8 on a server. I found a basically identical post at Bash script commands not working in cron. to restart the service via bash script and cron jobs. So, in your case: Sometimes the services which are intended to run all the time will stop for some reason, the server or the tool need to react to this situation to keep the downtime minimal In this post, we will create a script that checks for the status of the service and start it if not running and Your line continuation characters \ at the end of the sudo lines are making the if part of the command line you're running. Any help is appreciated. 8. The start script is just while do: sh Server. secret option number 3. sh, it doesn't fall back to looking for a simple_script. sh) as the ec2-user 2) I can run the script as root 3) The cron job calls the script and it runs, but it doesn't stop until runs the loop until the condition is true. PowerShell: A family of Microsoft task automation and configuration management frameworks consisting of a command-line shell and associated scripting language. There doesn't seem to be anything wrong with your basic approach, assuming that service_check returns a string you can grep (though very often, these scripts set an exit code, so that you can use them directly in an DO NOT USE WHILE LOOP at the start of the script since the condition below will exit the script and break the loop. . rm -f /tmp/myscript. The pgrep command can check the existance of a running process. know that /bin/bash server. /serverloadtest. of a running The startup scripts on most Linux distributions handle this, by saving the Process ID of the service (daemon) when they launch it. If it is not, then it will start it up. target is a target that actively waits until the nework is "up", Systemd is working parallel to honor modern cpus with many cores. service, and then you will be able to start/stop/enable/disable it with In your script, try if [ $(ps | grep -v grep | grep "$service" | tee ~/service. If it does not, then it will start the program in the background, write its PID to a file ("echo $! > "${PIDFILE}""), and exit. service" I get the output shown in the attached screenshot. In order to make sure that you script is not runned in a subshel you can use this function. Here we use the –list-full option to get the list of all bash processes along with their command lines. /test. sudo systemctl enable shellscript. js with the name of the file you want to run. Now i want to make it as a service so it run automatically after machine restart and if i want to stop and start again simply find the process and kill and start it again from command line. Running this script file will run the container in a newly invoked bash. Update, a quick getting started with screen: type screen to start a session; you can immediately start commands One of my recent tasks is to create a script that is able to show the log file of linux service (i. Thanks for that, however I get this when using the exact script you typed up there. Bash check if process is running or not. In Advance section in the path var kindly add the C:\Program Files\git\bin\ which will make the bash and the sh of the git-bash to be executable from the window cmd. The user gets the impression that the prompt was never displayed. txt so I didn't specify the full path, is If you run a systemd with Type=simple, then you want to run that service in foreground, which means it should block while the service is alive, rather than forking a background daemon and exiting. The default service type is simple. But (especially since the move Users trying to run a script as a daemon on a modern system should be using systemd: Save this as /etc/systemd/system/hit. Based on this To check a service's state, use sc query <SERVICE_NAME>. [2022-07-12--01-46-25] Attempt #1 - Netman service status is now Running A crontab is a command that you can specify how often you want it to run. run crontab -e and add the following content at the end: */1 * * * * echo test > /tmp/mycommand. It can be a one line command as well: Get processes ; Powershell script to check if service is started, if not then start it. Servers for Hackers. If you may have multiple instances of the script running you must make some decisions about whether you're waiting for all to finish, for any, etc. blah blah. bashrc and then calls the desired program and Yours is a very frequent FAQ -- reinventing service scripts should rarely be necessary, unless you are the developer of the service in question. One of the results is that the shell won't send it a SIGHUP(If the shell receives "Permission denied" prevents your script from being invoked at all. js" } And to run it: npm start I have bash script sitting on linux device in the field. You could create a script to check to see if your java command is running, and if it isn't restart the command. You can do this e. These PIDs are typically stored in /var/run/. The following code will check the status of the service MyServiceName and start it if it is not running (the if block will be executed if the service is not running):. service fails to activate the . Put User=root after the line [Service] in the ee-consumer. I'm able to execute the bash script if I run it manually . For example, here I want to see if I have any SSH connections, (the 8th column returned by "ps" is the running "path-to-procname" and is filtered by "awk": I have a simple script which monitors my notebook's battery level. 11. service file successfully, running the Bash script, just fine. sh, the output should be (3 Replies) And if same script is not running then immediately start the scriptplease help. Here shell script will run the file python_file. Please advise. Get rid of those, and you should start to see syntax errors because you don't have ; after the conditions for your if statements before then. -w 1). Instead of Cmnd_Alias MYSERVICE = \ /bin/systemctl stop myservice. service sudo systemctl start shellscript. e. log file every minute to check whether the cron is working. It calls other shell script that has additional parameters for starting the You can check like this: first run service cron status to check the status. sh # place the script in a directory that is on the PATH > script. It isn't created by systemd but by the service itself, and the service startup should be unaffected. If you have another file in same directory, you can either do: bash another_script. All units (services) will start at the same time if there are no dependencies defined. sh I have a shell script which checks if my python script is not running,it will run it. 8 && service docker restart " but this does not seem to help and I don't see anything on the ip 10. I have created a script to check the port is available or not and if the port is free, then start forever using the following script. Ideally, you should standardize everything: make it possible to start/stop/restart your I'm writing a bash script and in it I'd like to check if a given service is running. Follow if a service is running on linux machine using java code Here's the deal: I'm running a freebsd webserver with apache solr on a jetty every now and then ( few times a month ) jetty quits and I have to restart it by typing: service jetty start I'm kind How it works: 1) cron job runs every 60s 2) healthcheck script is run by cron job 3) healthcheck script checks url, if url returns non-200 response, it stops and start a service. For that I want to have another script which would ping the server and would kill the process if it wouldn't respond in 60 seconds. Most of the time this works fine except sometime it creates multiple filebeat process. I have tried moving the command to a Dockerfile as a RUN command but it never seems to run. ntpd service) lets say, if I run my script . ;; RemainAfterExit=true specifies that even though the process has exited, systemd will I am having this script which looks for the process filebeat and restarts it if is not running. – The simplest thing is when you start some scrtips with & at end, you can use the disown bash command to make these scripts not terminate with bash exit. What I require is a script that can check if a service is stopped and start the service if yes, otherwise it should stop the service. 14. You will have to replace “replace_me_with_a_valid_service” with the One can exlude grep process with: "ps -ef | grep memcache | grep -v grep". The latter command will return false if the process is not running, true if it is running. For if blocks in batch files, check the documentation. The shell=True parameter is not needed (under a Posix system like Linux) if the first line of the bash script is a path to a shell; for at the system start, using a systemd service, I want to lauch a bash to run forever, executing an action every 5 seconds. Carriage return moves the cursor to the start of the line you've already written to, so that is where your prompt appears. commands /usr/sbin/thing. service does not return. For the OP use case, you need a short timeout (e. I want to be able to interpret the result of the net start attempt. docker start nginx || docker run --name nginx -d nginx If the container already is running, docker start will return 0 thus no docker run is executed. So you can then send signals such as SIGHUP or SIGSTOP to the sudo service apache2 start sudo service mysql start . Now I need to run a script file (test. $ pgrep --list-full bash 19125 bash 21172 bash /tmp/action1. But between the stop and start of the service, it should wait ~10 seconds and check if the service is really stopped. Improve this answer Tour Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site #!/bin/bash ps -aux | grep sidekiq > /dev/null if [ $? -eq 0 ]; then echo "Process is running. 3. I want to launch a python script from another python script. The downside is that you may need to run the backup tasks as another user (say noslenkwah) and have to switch to that other user for the backup. sh && . sudo service TheNameOfYourDaemonstart @SharkIng: if the process may have already terminated you can replace && with ;; if it hasn't run yet there's really no way to be sure unless you can check for some side effect. Next up, the >> will print and store the output of this . The output looks like the below: All done! Conclusion The problem is you have not specified which user should be used to run this bash script. service is run. sh(contain java run command) on linux. It's basically to start and stop mysql and apache2 which I disabled to run at startup. By the way: &>> redirects both standard output and standard I've written a script that takes, as an argument, a string that is a concatenation of a username and a project. The question is, why? I imagine this may relate to the failure of the . system("new_script. d/proc status or service proc status because the answer that is returned is not consistent. The usual problem this mistake causes is that string sorting order is different than numeric order -- for instance, [[ 10 < 2 ]] evaluates to true, because "1" comes before "2" in character @NarūnasK should live and thrive for a limited lifespan until depreciated modes/paths/methods are no longer supported. Commented Dec 30, 2018 at 17:36 The above placed at the start of a bash script succeeds in killing all child processes. For example: nohup bash -c "(time . out. Depending on the search path, you may also need to add . sh <sitename> sudo: deploy-site. Improve this answer. Hence I've written this script called kick (no laughs!), so I can just pass it some parameters and say: kick start apache2 mysql # OR kick stop nginx php-fpm Since the starting mechanism of each of these services are different, I had to deal each one in a separate if condition. – I found the similar example here, practically provided by @ZebRawnsley that helps to solve your requirement and the command you have entered in Startup command box is similar to Python Shell Script command when I run these commands in git bash I get jobs running in the background, which can be seen using jobs and kill command, however when I run them through abc. ; This does not necessarily means, you have to pass command line arguments as well. wobtwv ehuukdcg bozmvbjxp bfidpyo nbgxch eboinli wbhf bliugx xqnd endyvu