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regular expression at the end of grep

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# 1  
Old 06-11-2010
regular expression at the end of grep
Ps output:

Code:
vps3:~# ps axf| grep 'blkback.3.'
 4854 ?        S<     0:00  \_ [blkback.3.xvda1]
 4855 ?        S<    30:49  \_ [blkback.3.xvda2]
15036 ?        S<     1:03  \_ [blkback.32.xvda]
15037 ?        S<    10:57  \_ [blkback.32.xvda]

Which regular expression should I use just to grep only 'blkback.3' and not 'blkback.32'

Code:
 4854 ?        S<     0:00  \_ [blkback.3.xvda1]
 4855 ?        S<    30:49  \_ [blkback.3.xvda2]

??

thanks in advance
Last edited by pludi; 06-11-2010 at 10:16 AM.. Reason: code tags, please...
# 2  
Old 06-11-2010
Code:
vps3:~# ps axf| grep 'blkback.3\.'

# 3  
Old 06-11-2010
nice..

do you know why this regular expression does not work?

vps3:~# ps axf| grep 'blkback.^3$.'

??
# 4  
Old 06-11-2010
AFAIK ^ and $ are meant to match the beginning and end, respectively, of a whole string, not a substring.
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