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List Certain Output

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# 1  
Old 09-22-2011
List Certain Output
Hi Expert,

I have a text file that contain the following data
Code:
USER       PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
root      1397  0.0  0.0      0     0 ?        S<   Jul14   0:00 [aio/28]
john      1398  0.0  0.0      0     0 ?        S<   Jul14   0:00 [aio/29]
john      1399  0.0  0.0      0     0 ?        S<   Jul14   0:00 [aio/30]
ruby         7  0.0  0.0      0     0 ?        S<   Jul14   0:00 [watchdog/1]
root         8  0.0  0.0      0     0 ?        S<   Jul14   0:01 [migration/2]
jane         9  0.0  0.0      0     0 ?        SN   Jul14   0:00 [ksoftirqd/2]
john        10  0.0  0.0      0     0 ?        S<   Jul14   0:00 [watchdog/2]
root        11  0.0  0.0      0     0 ?        S<   Jul14   0:01 [migration/3]

Now, what I want is to list just user john and ruby with certain header, e.g:
Code:
USER       PID %CPU %MEM     TTY    STAT TIME COMMAND
john      1398  0.0  0.0      0     0 ?        S<   Jul14   0:00 [aio/29]
john      1399  0.0  0.0      0     0 ?        S<   Jul14   0:00 [aio/30]
ruby         7  0.0  0.0      0     0 ?        S<   Jul14   0:00 [watchdog/1]

How do I do that? with awk?

Thank you Expert.
Last edited by Scott; 09-22-2011 at 01:20 AM.. Reason: Code tags, please...
# 2  
Old 09-22-2011
Code:
$ egrep "^USER|^john|^ruby" infile

# 3  
Old 09-22-2011
Code:
$ nawk '/USER|john|ruby/' filename
USER       PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
john      1398  0.0  0.0      0     0 ?        S<   Jul14   0:00 [aio/29]
john      1399  0.0  0.0      0     0 ?        S<   Jul14   0:00 [aio/30]
ruby         7  0.0  0.0      0     0 ?        S<   Jul14   0:00 [watchdog/1]
john        10  0.0  0.0      0     0 ?        S<   Jul14   0:00 [watchdog/2]

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