Re: log reading while updating
On 12/21/07, Jochen Schulz <ml@well-adjusted.de> wrote:
> roberto:
> >
> > a runnig program logs its output to a file and i'd like to read this
> > log file "while" it is being written and updated by the program, and
> >
> > possibly searching in it for patterns and so on
>
> When you want to search for specific patterns, you can either
>
> $ tail -f /var/log/syslog | grep foobar
>
> That way you only see lines containing your pattern.
>
> Or you use "less /var/log/syslog", then search ('/') for your pattern
> and then press 'F' ("Follow changes") which gives you a tail-like
> display of the file. The difference is that less will highlight matches
> but still display all the rest.
>
> BTW, less has some really handy functions, like '-S' to toggle line
> wrapping and '-N' to toggle the display of line numbers. Just press 'h'
> to get an overview. And it can display colors, which grep can do, too.
>
> J.
thank you for the very extended reply
i'll let you know about the outcome
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