Category:Bash
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Bash is a *nix shell. Much more is still in the antiperfect unix site.
To check within a startup script (like .bashrc) whether or not Bash is running interactively. Test if $- has an 'i' in it or if $PS1 (the prompt) exists.
case "$-" in
*i*) echo This shell is interactive ;;
*) echo This shell is not interactive ;;
esac
if [ -z "$PS1" ]; then
echo This shell is not interactive
else
echo This shell is interactive
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