0

I am quite novice with Linux. I have a similar need to this post : pipe and log STDOUT at the same time, but not sure to understand what to do from what is explained :/

I have a command which computes data for several hours and outputs everything in an external log file (log-01) and any error in a dedicated one (log-error) like so:

myCommand > log-01 2>log-error

But I would like to also display on my terminal the different sequential steps of this process by picking up - from the stream or from log-01? -some specific key words and display any associated data of my choice (basically some following numbers or whole line, depending on the step to he checked). Basically what I would do with a grep instruction.

When my log-01 records thousands of lines, my terminal only displays the 20 sequential steps or so.

Thanks in advance for your tips!

2

Use tee:

myCommand 2>log-error | tee log-01
  • Hi Jayhendren, Is tee can allow me to apply some filters of what will be displayed on my terminal (I don't want the whole log, only some key parts of it). Thanks – Bispen Dec 6 '16 at 21:07
  • Pipe the output of tee through grep. – DopeGhoti Dec 6 '16 at 21:10

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.