Here’s an example on how to run MySQL commands from Bash.
mysql dbname -e "UPDATE wp_options SET option_value='http://domain.com' WHERE option_name='home'"; mysql dbname -e "UPDATE wp_options SET option_value='http://domain.com' WHERE option_name='siteurl'"; |
The example updates WordPress’ home and siteurl. Script contains no password. It’s using .my.cnf config file.