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qinshulei/is-command-exists

Last active August 29, 2015 14:05
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check if command exists
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is-command-exists
# 1. use command -v
command -v foo >/dev/null 2>&1 || { echo >&2 "I require foo but it's not installed. Aborting."; exit 1; }
# 2. use type .
if ! type "$foobar_command_name" > /dev/null; then
# install foobar here
fi
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