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Bash is quite verbose when running jobs in the background:
$ echo toto& toto [1] 15922 [1]+ Done echo toto Since I'm trying to run jobs in parallel and use the output, I'd like to find a way to silence bash. Is there a way to remove this superfluous output?
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To silence the output of a command, we redirect either stdout or stderr — or both — to /dev/null. To select which stream to redirect, we need to provide the FD number to the redirection operator.
Job control refers to the ability to selectively stop (suspend) the execution of processes and continue (resume) their execution at a later point. A user typically employs this facility via an interactive interface supplied jointly by the system's terminal driver and Bash. The shell associates a job with each pipeline.
There are many methods to quit the bash script, i.e., quit while writing a bash script, while execution, or at run time. One of the many known methods to exit a bash script while writing is the simple shortcut key, i.e., “Ctrl+X”. While at run time, you can exit the code using “Ctrl+Z”.
You can use parentheses to run a background command in a subshell, and that will silence the job control messages. For example:
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