Find and replace a string in all files of a directory 3

[RVSachin]

Hi,

The following command appends the contents of myfil.txt to each *.scr file in each folder under the directory maindir.

find maindir -name '*.scr' | while read f; do cat /path/to/myfil.txt >> "$f"; done

My question is, how can we "find and replace a string" in all the *.SCR files in each subdirectory under MAINDIR?

For example if I have a main directory MAINDIR, and lot of sub-folders within MAINDIR which contain a *.scr file, then how do I find a particular line that has a string "IT'S ME" and replace it with "ARE U THERE" in that line.?

Thanks,

RV

 

[ericbrunson]

perl -p -i.bak -e 's/oldstring/newstring/g'

That's off the top of my head, read the man page.

 

[futurelet]

[tt]
ruby -i.bak -p -e '$_.gsub!(/foo/,"bar")' $f
[/tt]

 

[futurelet]

Previous version was too verbose.

ruby -i.bak -p -e 'gsub!(/foo/,"bar")' $f

 

[PHV]

find maindir -name '*.scr' | while read f
do echo "%s!IT'S ME!ARE U THERE!g\nwq" | ex -s "$f"
done

Hope This Helps, PH.
Want to get great answers to your Tek-Tips questions? Have a look at FAQ219-2884 or FAQ222-2244

 

[RVSachin]

Thanks PHV, It's seems like you have a solution for every problem.

Thanks to others as well.