Created
October 6, 2013 15:50
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bash check command exist
http://stackoverflow.com/questions/592620/check-if-a-program-exists-from-a-bash-script#answer-677212
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$ command -v foo >/dev/null 2>&1 || { echo >&2 "I require foo but it's not installed. Aborting."; exit 1; } | |
$ type foo >/dev/null 2>&1 || { echo >&2 "I require foo but it's not installed. Aborting."; exit 1; } | |
$ hash foo 2>/dev/null || { echo >&2 "I require foo but it's not installed. Aborting."; exit 1; } |
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