Redirect line of output

[brynden hutmacher]

How do you redirect just a line of out put from the ps -l command?

[Michael Wicherski]

uhm

just one line?
if you wanted line 2 you could do

ps -l | head -2 | tail -n1 > file

run ps command with l option
then pipe into head and print out first 2 lines
then pipe into tail to print the last line (of 2 so line 2)
then redirect to a file
o.O

(i think that should work anyway; not too familiar with the ps command yet)

**edit/update** notice that the first line ps prints to the screen, the column titles, is also counted, so if you want the second item on the list, you actually want the third line**

[ollie wright]

I used:
ps -l | grep "13298 13266" | tee bigshell which put the line I wanted into the bigshell file.

Ollie

[Diane Dymesich]

Thanks Mike and Ollie!
I used Mikes answer and was about to try Ollies but I got a message from root saying "system Halt now!"
Guess I'll have to do the rest later!
Diane

[Marcos Valdebenito]

Hey Olli
what is "13298 13266" in your command?



I used:
ps -l | grep "13298 13266" | tee bigshell which put the line I wanted into the bigshell file.

Ollie

[Michael Wicherski]

it would seem that he first did the ps -l command on its own and then grep searched the output to match the filesize of the biggest shell

whereas with mine you need to run ps -l on its own and then count the lines; up to you which is easier to remember

[ollie wright]

RE: "13298 13266"
That was the combination of the pid and ppid when I first ran ps -l. I ran it (ps -l) just now and got a different combination. These numbers will be different for each person and vary by session. The point is to find something unique on the line you want grep to match. I tried grep using the process size at it also worked. If you just use the ppid, you get the pid's and ppid's linked to the ppid.

Hope this helps - Ollie

[Marcos Valdebenito]

Hi illi
thanks, it make sense...
Thanks again

[ollie wright]

This is a very useful and flexible bit of code. I enjoy looking at code and seeing how someone else solves a problem.

Thanks..

[Rich Simms]

Both ways work well, another spin on Ollie's would be:

[code]sh-3.2$ ps -l | grep csh > bigfile[/code]

- Rich