Re: "Tailing" grep

On 2007-09-30, Brian Fahrlander wrote:

> While we've got the attention of the most-able on this subject, I'd
> like to reopen a discussion about a very similar tool: a 'grep' that
> happens on tailing a file. There have been dozens of times that I'm
> looking for a message number in /var/log/mail.log and would love to see
> only the lines mentioning that message.
>
> A couple of years ago I asked and got a "maybe you could write
> something", but I actually never could. It's not as easy as it looks.
>
> Any chance you guys have seen this done?

If you're interested in doing this within a script called by cron or at, you might want to look at the logtail package (which is used by logcheck).

Basically it stores (in a configurable file) the line number it last read, and when called again gets the lines after that and updates the marker.

-- 
ubuntu-users mailing list
ubuntu-users@lists.ubuntu.com
Modify settings or unsubscribe at: 
https://lists.ubuntu.com/mailman/listinfo/ubuntu-users