Find a file in a directory that contains a string under Linux

Sometimes I have to find some strings, but I don't know which file, just remember some strings

So how do you find files that contain a piece of text under Linux?

A powerful find command can help you accomplish an impossible task.

For example, I only remember my program contains a unique string "Sms_issend", so:

Find if all files in the directory contain a string

Find. | Xargs Grep-ri "Sms_issend"

Finds all files in the directory that contain a string, and prints only the file name

Find. | Xargs Grep-ri "Sms_issend"-l

Find a file in a directory that contains a string under Linux