Tailing logs

Oliver Fromme olli at lurza.secnetix.de
Fri Aug 22 15:39:22 UTC 2008

DAve <> wrote:
 > I would love to have a way to tail a log, like piping to grep, except I 
 > see every line and the lines I would normally grep for are highlighted. 
 > That would be cool. Anyone know of a bash command or tool that will do this?
 > Side note, I am tailing sendmail after changes to my outbound queue 
 > runners. I want to highlight my sm-mta-out lines but still see all lines.

You could use this script:


It's a filter that works like similar to grep, but it
highlights the parts that match your regular expression.
The script contains usage information.

So you can do things like this:

$ tail -f /var/log/maillog | bold -l myhost.mydomain

(The -l option specifies to highlight the whole line,
not just the part that matches.)

Best regards

Oliver Fromme, secnetix GmbH & Co. KG, Marktplatz 29, 85567 Grafing b. M.
Handelsregister: Registergericht Muenchen, HRA 74606,  Geschäftsfuehrung:
secnetix Verwaltungsgesellsch. mbH, Handelsregister: Registergericht Mün-
chen, HRB 125758,  Geschäftsführer: Maik Bachmann, Olaf Erb, Ralf Gebhart

FreeBSD-Dienstleistungen, -Produkte und mehr:  http://www.secnetix.de/bsd

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recovery for months."
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