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How do I run a shell script inside a shell script?
There are a couple of different ways you can do this:
- Make the other script executable, add the #!/bin/bash line at the top, and the path where the file is to the $PATH environment variable.
- Or call it with the source command (alias is . )
- Or use the bash command to execute it: /bin/bash /path/to/script ;
How do you check if a script is already running in Linux?
An easier way to check for a process already executing is the pidof command. Alternatively, have your script create a PID file when it executes. It’s then a simple exercise of checking for the presence of the PID file to determine if the process is already running. #!/bin/bash # abc.sh mypidfile=/var/run/abc.
How do I check if a Unix script is running?
Linux command to check if a shell script is running or not
- ps -ae shows the scriptname for me. – nims. May 30 ’13 at 4:40.
- ps aux|grep scriptname or pgrep scriptname. – Basile Starynkevitch. May 30 ’13 at 4:40.
- Or pidof to just get the PID. – tripleee. May 30 ’13 at 5:12.
How to run shell script inside a shell script?
If the scripts rely on local files in their directory (and may even break down and do damage if called from elsewhere), then you should either leave it in the current form (this actually prevents you to call them from places you are not supposed to), or use cd inside the script to get to the proper location.
What happens when you call script from another shell?
The exec will kill or terminate the current shell before executing the called script. So, you will end up with the context of the called script rather than the caller script when the script ends. In most cases, it is fine and work just as well.
How can I Run my bash script from anywhere?
If you want to run your bash script from anywhere, as if it were a regular Linux command, add the location of your shell script to the PATH variable. First, get the location of your script’s directory (assuming you are in the same directory), use the PWD command: pwd. Use the export command to add your scripts directory to the PATH variable.
When to use Bash instead of hello.sh?
When you include the line “#!/bin/bash” at the very top of your script, the system knows that you want to use bash as an interpreter for your script. Thus, you can run the hello.sh script directly now without preceding it with bash.