Re: syntax [grep/tee]

[Colin Watson <cjwatson@debian.org>]

On Sun, Jun 22, 2003 at 09:54:33AM +0100, Hugh Saunders wrote:
> hello, a couple of fairly simple bashish questions:
> 
> 1. whats the advantage of using |tee -a rather than >> ?

tee displays its input on standard output as well as writing it to the
file.

> 2. how can i consolidate |grep -v from |grep -v archive?
> - i think it should be something like |grep -v \(archive|from\) but that
>   doesnt seem to work..

You need quotes, and you need '\|' rather than '|'. Try this:

  grep -v '\(archive\|from\)'

Alternatively, extended regular expressions make grouping slightly
easier:

  egrep -v '(archive|from)'

-- 
Colin Watson                                  [cjwatson@flatline.org.uk]