Question

Is it possible to validate the given MySQL username and password using shell script without attempting to login to the MySQL service? If so, How? I haven’t found any useful solutions.

Answer 1

Try this. It works.

mysql -u$USER_NAME  -p$PASSWORD -eexit

If you provide correct login credentials, the exit code will be 0 else it will be 1.

Example:

miyurz@my-host:~$ mysql -uroot  -pabc123 -eexit

ERROR 1045 (28000): Access denied for user ‘root’@’localhost’ (using
password: YES)

miyurz@my-host:~$ echo $?
1
---------------------------------------------------

miyurz@my-host:~$ mysql -uroot  -pabc12 -eexit

miyurz@my-host:~$ echo $?
0

Explanation:

-e, --execute=name  Execute command and quit.