ali aboos

Well… there are several ways of doing this in Linux and Unix:
find /<path> 'filename.extension> (wildcard allowed)
find /<path> *.* | xargs grep <string>
find . -type f -exec grep "<string>" {} \; -print
grep -r "<string>" /<path>/<filename>
You can also add a ‘>> <filename>’ (no quotes) to the end to write the output to a file so you can take a look at it later.

To recursively find and replace a string within files:
find . -type f | xargs perl -pi~ -e 's/<current string>/<new string>/g;'
sed -i '<current string>/from/to/<new string>' `find . -name \*.ext`
Put `find . -name \*.ext` in a double quote and it should work for filenames with space as well.

If you want to find and delete files or directories recursively, look here.

Hold “fn” while pressing the power button!