How to get names of all the files (in one directory) contain a certain line of text?

Question

for example:

I hope to get names of all the files contains

start on startup 

in /etc/init.

Answer 1

You could try the below grep command,

$ cd /etc/init
$ grep -l "start on startup" *

OR

Through a single command,

$ grep -l "start on startup" /etc/init/*

From man grep,

-l, --files-with-matches  print only names of FILEs containing matches

Answer 2

I believe the following should do the trick:

grep -ls 'start on startup' /etc/init/*

This will grep through all files in your /etc/init directory and print out only the filenames while also omitting any errors (i.e. /etc/init/<dir_name> is a directory).

Here is a post that explains the -l option: grep-show-just-filenames

Here is another post that explains the -s option: grep-omit-file/directory-errors