Shell script traversing the all subdirectories and modifying the content of files

I need to modify a number of files inside a directory. I need to modify all those files which contain particular text and have to replace with 开发者_开发知识库some new text.

So I thought of writing a shell script which will traverse through all the subdirectories and modify the content but I'm having problem while traversing the all possible directories.

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You can use find to traverse through subdirectories looking for files and then pass them on to sed to search and replace for text.

e.g.

find /some/directory -type f -name "*.txt" -print -exec sed -i 's/foo/bar/g' {} \;

will find all txt files and replace foo with bar in them.

The -i makes sed change the files in-place. You can also supply a backup-suffix to sed if you want the files backed up before being changed.

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GNU find

find /some_path -type f -name "*.txt" -exec sed -i 's/foo/bar/g' "{}" +;

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http://git.savannah.gnu.org/cgit/bash.git/tree/examples/functions/recurse

:)

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You want find.

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for n in $(find  | grep txt$)
do
   echo $n
   modify_content.sh $n
done