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Re: What can affect whether a comamnd is found in PATH?


From: Jeffrey Walton
Subject: Re: What can affect whether a comamnd is found in PATH?
Date: Thu, 24 Jun 2021 09:19:03 -0400

On Wed, Jun 23, 2021 at 2:33 PM Peng Yu <pengyu.ut@gmail.com> wrote:
>
> $ type -P cmd
>
> I am trying to find a command using the above command. But it finds nothing.
>
> Then I call the command with its abspath.
>
> $ /abs/path/cmd
>
> Then I can find the command. I also run `hash -r` before. But it didn't help.
>
> $ type -P cmd
> /abs/path/cmd
>
> `type` is the following builtin.
>
> $ type type
> type is a shell builtin
>
> This looks weird. Does anybody know how to debug this issue?
>
> Can I exclude the possibility that this is caused by a bug in this
> version of bash?

Use 'command -v' to locate a command, not 'type' or 'which' or other
random things you find on Stack Overflow.

'command -v' handles PATH and other things that affect locating a
program, like an alias.

The 'command' command is Posix so it works everywhere.

  $ command -v awk
  /usr/bin/awk
  $ command -v grep
  alias grep='grep --color=auto'

Jeff



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