Find files containing something in Linux

Grep

1. grep -lir "String_to_find" * :searching from the current path

-l print only the file names containing your search term

-r recursive

-i case insensitive

* all files

grep -iw glcore XFree86.0.log search glcore in file XFree86.0.log

-w means whole word match

Find

1. find /start_path -name *.txt | grep -lir "some text" *   : start searching from the given path

$ find / -name arrow.jpg
$ find ~ -name 'arrow*.xbm'
$ find ~ -name '*.xbm'
$ find / -uid 1005

Locate
$ locate -i filename