WP CLI is a command line tool for managing your WordPress installation.
Install WP CLI
$ curl -O https://raw.githubusercontent.com/wp-cli/builds/gh-pages/phar/wp-cli.phar
$ php wp-cli.phar --info
$ chmod +x wp-cli.phar
$ sudo mv wp-cli.phar /usr/local/bin/wp
Move into the wordpress directory and type:
$ wp user list
to see all users. Find the ID of the user you’d like to update.
Then, update the user
$ wp user update 1 --user_pass=$UP3RstrongP4$w0rd
replacing “1” with the id of the user you want to update.