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ps command problem

 
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# 1  
Old 01-19-2012
ps command problem
im using this code below
clear

ps -e -o pcpu,pid | grep \^"0.00" but this outputs nothing at all!only if i delete grep command its running properly, ps -e -f pcpu,pid !!! :@@@
why is this happening??????
Last edited by methyl; 01-20-2012 at 12:59 PM.. Reason: Add code tags so I can see whether there are spaces in the command line
# 2  
Old 01-19-2012
Probably because 0.0 isn't actually at the beginning of the line.

How about:
Code:
ps -e -o pcpu,pid | awk '$1 == "0.0"'

to match all lines where the first token is the string "0.0"
# 3  
Old 01-20-2012
Haven't we been here before?
https://www.unix.com/unix-dummies-que...#post302588966
What does the output from your version of "ps" look like?
# 4  
Old 01-20-2012
it outputs nothing at all...but without grep i can see the pid and the %cpu collumns..i cant understand why is this happening...
# 5  
Old 01-20-2012
What outputs nothing at all? The code of yours I already explained why it didn't work, because 0.0 isn't actually at the beginning of the line?

Have you tried my solution yet?
# 6  
Old 01-20-2012
no corona!i'm trying to explain to methyl what outputs cames from my code!i haven't tryied it yet!i'll try it though!thanks for the reply!
# 7  
Old 01-20-2012
Quote:
Originally Posted by strawhatluffy
no corona!i'm trying to explain to methyl what outputs cames from my code!
When they ask for your output they don't want you to describe it. If you don't know why it's not working, then there's things wrong with the data you don't know about, and your own description will be insufficient.
Code:
%CPU   PID
 0.0     1
 0.0     2
 0.0     3
 0.0     4
 0.0     5
 0.0     6

Notice how it's not actually at the beginning of the line?
 
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