grep

[Ant2ne]

grep command is pretty neat-o. 8) But I find it lacking :P

ant2ne@ant2ne-laptop:~$ ps -A | grep "konsole"
15400 ?    00:00:00 konsole
ant2ne@ant2ne-laptop:~$

What I want to do is

ant2ne@ant2ne-laptop:~$ ps -A | grep "konsole" > kill

But the other information after the PID (ie. "? 00:00:00 konsole" ) is ruining my kill command.

How can I do this in a simple script without breaking out the gcc. (I haven't rented the C book from the library yet.)

(note: this is just an example. I do have other uses for the kill and grep commands. I do have other ways of killing the konsole i'm typing into)

[kubicle]

Re: grep

One option (by far not the only one) is to use the 'cut' command after grep, see 'man cut'

crude example:

command | grep (to get the correct line) | cut (to get the correct part of the line)

[jankushka]

Re: grep

not sure your redirecting the output of ps|grep to kill will work.
also, doing ps|grep sometimes results in 2 lines, one of which is the grep itself.
you gotta get rid of that, too.
anyway, an alternative to cut is awk
i'd do it like this:

kill `ps -A | grep konsole | grep -v grep | awk '{print $1}'`

hth

[lingenfr]

Re: grep

I'm sure I don't get it, but why wouldn't you just

sudo killall konsole

[Ant2ne]

Re: grep

I'm sure I don't get it, but why wouldn't you just

sudo killall konsole

Like I said above, I do have other ways of killing it. But I want to figure out how to get pieces of info off of a line with the grep command.

kill `ps -A | grep konsole | grep -v grep | awk '{print $1}'`

That worked.. now I just gotta figure out "how that worked" I never seen 'grep -v grep" or "awk" much less '{print $1}'` I have no idea what those do. But it is interesting to know, that the things I want to do ARE possible.

[penguin.ch]

Re: grep

grep -v grep

http://linux.die.net/man/1/grep

awk '{print $1}'

http://www.tldp.org/LDP/abs/html/awk.html