Mysql Command Line Client

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Internal

Connect

mysql -u root -p

Will challenge for password.

mysql -u root -p<password>

No space after -p.

The username and password can also be stored in ~/.my.cnf:

[client]
user = root
password = XXXXXXXX

Scripting Database Interaction

mysql -u root -p<password> < statements.sql

where statements.sql should contain SQL:

SELECT VERSION();
...

Alternatively:

mysql -u root -p<password> -e "SELECT VERSION()" 2>&1