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lang-bash
command -v, I use it all the time, to check for command availability. For example,command -v CMD > /dev/null || echo 'CMD not found'No stupidifs required!!command -voption. See stackoverflow.com/q/34572700/1175080.command -vdoes not do exactly whatwhichdoes: The latter exits with non-zero code, if the argument is an alias or a shell function.zsh,command -vwill happily print out an alias. See my answer for a solution which works in bothzshandbash.