SED replacement character

Sed-i s/"str1"/"str2"/g ' grep "str1"-rl--include= "config"./'

Replaces the str1 string in all config files in the current directory (including subdirectories) with the STR2 string.

Parameter explanation:
Sed:
-I represents the operation of the file, the ' ' enclosed grep command, which represents the result of the grep command as the action file
s/"str1"/"str2"/means to find str1 and replace with STR2, followed by G to indicate that there are multiple str1 in a row, instead of replacing only the first one

Grep:
-R means to find the current directory and all subdirectories
-L indicates that only qualified file names are listed, which are passed to the SED command for substitution operations
--include= "config" means to find only config file