[ILUG] which which

[Mark Fallon]

"Robert D. Elliott" wrote:

> Hi, all.
> I've taken to a policy of extreme paranoia over the last few weeks, and
> I've found a few things that are somewhat bemusing; perhaps some genii can
> enlighten me.
> My main problem is the 'which' command; if I type 'which which', I'm told
> that it's an internal shell command. However, if I run 'newwhich which'
> (newwhich is a which I took from a different, secure box), it gives me
> '/usr/bin/which'.
> I'm not (quite) panicking about this apparent disparity, given that all
> boxes I'm using have a which command, but I'd like to know for sure. Any
> ideas?
>
> TIA,
> robert
>
> Robert Elliott          Systems Administrator, Planet Cyber Cafe
> rde at irelands-web.ie     http://robertelliott.org
>

I think this depends on the shell you are using.
For example under bash, which is seen as an executable
under tcsh which is a built-in shell command
under ksh which is an executable

I have tried this on three machines here Redhat 6.1, Irix 6.5, HP-UX 11.00,
they
all give the same results.

Regards,

Mark