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Bash shell scripting

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Bash – how to find last command exit status code

on Feb 2, 2016

When writing bash scripts or running something on command line, last command exit code status is stored in environment variable $?. It can also be used to get exit code of subshell command $(). Here is example bash code showing how you can use it.

ls /etc/passwd_non_existing > /dev/null 2>&1 
echo "exit code: $?"
ls /etc/passwd
echo "exit code: $?"
somevar=$(ls /etc/passwd_non_existing)
echo "exit code: $?"
exit code: 2
/etc/passwd
exit code: 0
exit code: 2
Env: GNU bash, version 4.2.46

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Posted in Tutorials | Tagged Bash shell scripting, Tutorials

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