Re: grep | sed do not function inline?

[Tyler Smith <tyler.smith@mail.mcgill.ca>]

On 2007-04-22, bilbo <bilbo@l-arrache.com> wrote:
> log file which contains a lot of information. I wanted to extract some
> informations out of it. But when I tried to
>
> tail -f mylog | grep 'smtg' | sed -n 's/end/notend/p'
>
> no output could be found. Which was quite surprising since the
> following tests did their job without any problem:
>
> tail -200 mylog | grep 'smtg' | sed -n 's/end/notend/p'
>

There is only one difference between these two lines - the first
extracts the last 10 lines of mylog, the second extracts the last
200. The data you want is apparently not in the last 10 lines of
mylog. 

Tyler