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bash remove multiple instances of text from file

Posted on 2006-06-14
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Last Modified: 2008-03-06
I want to remove text from a file but only if it occurs more than once in that file

Any ideas

Thanks


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Question by:jculkincys
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4 Comments
 
LVL 16

Expert Comment

by:xDamox
ID: 16906297
Hi,

You could try this:

if [ `grep -c keyword target.txt` -gt 1 ]; then `cat target.txt | sed -e 's/keyword/newkeyword/g' >> newfile.txt`; fi

You will need to reaplce the keyword with the word you are looking for target.txt is the file your searching through
newkeyword is what you want to replace the old keyword with and it will create a file called newfile.txt with the
alterations in.
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LVL 2

Author Comment

by:jculkincys
ID: 16906504
Cool

If I didn't want to create a new file could I do

if [ `grep -c keyword target.txt` -gt 1 ]; then `cat target.txt | sed -ie 's/keyword/newkeyword/g'`; fi



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LVL 16

Accepted Solution

by:
xDamox earned 2000 total points
ID: 16906968
Hi,

Almost you would do:

if [ `grep -c keyword target.txt` -gt 1 ]; then echo `cat target.txt | sed -e 's/keyword/newkeyword/g'`; fi

there is no i needed in the sed command also needed an echo :)
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LVL 2

Author Comment

by:jculkincys
ID: 16907178
Thanks
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