List all regular files containing (in their name, directory or their content) a specific (sub)string

Question

Like in the title, and also I want to print the number of the line in each (text) file where the substring occurs.

So far I have:

find /sys | grep "filesystem"

But it appears to only look at the names and directories of files, and not their content.

And how to search for several strings simultaneously? Because I think I should search additionally for "*filesystem", "filesystem*" and "*filesystem*" to include all possible occurances of the string.

Thank you in advance.

Answer 1

If you don't mind using two different commands for the file names and content, the below commands will help you.

find /sys -name "*filesystem*"

The above command will find all the files/directories with "filesystem" as part of the filename/directoryname.

grep -rn "filesystem" /sys/*

The above command will look for all the files containing "filesystem" in the content recursively and print out the line number along with the matching line. If you'd like to print only the line number without the content, you can use the below filter. You can substitute 2 with the column number you want to print.

grep -rn "filesystem" /sys/* | awk -F":" {'print $2'}