I recently came across the command where, which provides the actual path of executables in Linux. I was aware of which, whereis, locate and find, but not where.
I want to know when this command got introduced and why its manual is not available. Is this shell command specific to the C Shell or do all shells have the where command?
The only shells I know which has a builtin command called where is the tcsh and zsh. In the manual page of that shell (man tcsh / man zshbuiltins), you can find the definition:
where command (+)
Reports all known instances of command, including aliases, builtins and
executables in path.
Therefore it is the tcsh-equivalent of the bash builtin type (tcsh has no type):
tcsh$ where where
where is a shell built-in
tcsh$ where echo
echo is a shell built-in
/bin/echo
where is a shell builtin command in csh
where where
where is a shell built-in
the builtin is also available in zsh.
The linux command is called which. If you are used to in c-shells this might be a builtin. Bash builtins are documented through the bash builtin help.
From Wikipedia:tcsh
The built-in where command. Works like the which command but shows all locations of the target command in the directories specified in $PATH rather than only the one that will be used.
So I'm right: The where command is a tcsh built-in and not available as an external command. If you pay me 250$ I will write a little C command for you ;)
