[Ilugc] One Day One GNU/Linux Command (WHEREIS)
- From: raamanp@xxxxxxxxxxx (Raman.P)
- Date: Fri Aug 8 10:00:41 2008
--- On Thu, 7/8/08, Sivakumar Gopalan <sivakumar@xxxxxxxxxx> wrote:
Just a thought. Here is the difference between whereis,
locate and which
whereis - can find any file, but looks only in standard
locations.
locate - can find any file from any location, however there
should be a
locatedb update run frequently to have accurate results.
which - can find executables which are in the path
variable.
A similar command is type. It is shell builtin. Very fast, searches in $PATH
but only executables. e.g
type ls
A comparison with which
$ time which ls
alias ls='ls --color=tty'
/bin/ls
real 0m0.016s
user 0m0.000s
sys 0m0.010s
$ time type ls
ls is aliased to `ls --color=tty'
real 0m0.000s
user 0m0.000s
sys 0m0.000s
Raman.P
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