which — Locate a Command; Display Its Path Name or Alias
Synopsis
/usr/bin/which [filename] ... Description
which takes a list of names and looks for the files that would be executed had these names been given as commands. Each argument is expanded if it is aliased and is searched for along the user's path. Both aliases and path are taken from the user's .cshrc file.
Note
which is not a shell built-in command; it is the UNIX command, /usr/bin/which.
Bugs
Only aliases and paths from ~/.cshrc are used; importing from the current environment is not attempted. The which command must be executed by csh(1) because only csh knows about aliases.
To compensate for ~/.cshrc files in which aliases depend on the prompt variable being set, which sets ...
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