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DESCRIPTION
which returns the pathnames of the files (or links) which would be exe
+�-
...
mands  in a strictly POSIX-conformant shell.  It does this by searchin
+g
the PATH for executable files matching the names of the  arguments.  I
+t
does not canonicalize path names.

$ echo $SHELL
/bin/bash

$ echo $PATH
/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/game
+s:/usr/local/games:/snap/bin
...

$ perl -le 'print $];'
5.026001

$ perl -le 'print $];'
5.026001
$ export PATH=~/nonexistent:$PATH
$ perl -le 'print $];'
5.028000