How to find all files containing a specific word in Ubuntu?

Question

linux

To solve this problem, I used the command

sudo grep -Hr "искомый текст" /etc/ | cut -d: -f1 | sort -u

but now it seems to find the search word in all files, at least it lists all the files in the directory.
It is necessary that a list of only those files that contain the search word is displayed.

Answer 1

here