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matching a pattern in a file & prefixing a word

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# 1  
Old 04-29-2009
CPU & Memory matching a pattern in a file & prefixing a word
Hi,

In my shell script i have to match a patten in a file , if found i have to prefix the entair line by a "word"

eg. pattern = "aaa" prefix= #123
file: bbbb xxx
zzzz aaaa
qqqq kkkk

outPut file: bbbb xxx
#123zzzz aaaa
qqqq kkkk

Waiting your precious reply.....
# 2  
Old 04-29-2009
The not so precious suggestion would be:
Code:
sed '/aaa/ s/^/#123/' myFile

# 3  
Old 04-29-2009
CPU & Memory i need its reverse procedure
Quote:
Originally Posted by vgersh99
The not so precious suggestion would be:
Code:
sed '/aaa/ s/^/#123/' myFile

First of Thank you,......I also need to delete that #123 where pattern "aaa" is there
pattern = "aaa" prefix= #123
file: bbbb xxx
#123zzzz aaa
qqqq kkkk


file: bbbb xxx
zzzz aaaa
qqqq kkkk
# 4  
Old 04-29-2009
You could have experimented a bit......
Code:
echo '#123 asdfjkh aaa sdfkj' | sed 's/^\(#123\)\(.*aaa.*\)/\2/'

# 5  
Old 04-29-2009
CPU & Memory Thank you.....
Quote:
Originally Posted by vgersh99
You could have experimented a bit......
Code:
echo '#123 asdfjkh aaa sdfkj' | sed 's/^\(#123\)\(.*aaa.*\)/\2/'

Thank you , your code works fine......
By the way in ur reply gap.....i designed another code that's equivalent to yours

grep aaa a.c | sed 's/#123//'

Thankyou very much .......bye
# 6  
Old 04-29-2009
Quote:
Originally Posted by shivarajM
Thank you , your code works fine......
By the way in ur reply gap.....i designed another code that's equivalent to yours

grep aaa a.c | sed 's/#123//'

Thankyou very much .......bye
Sorry, I don't understand what's being said here.......
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