https://wp-cli.org/

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

Danach im jeweiligen WP root Dir starten

sudo -u www-data wp

Help

sudo -u www-data wp help

Core Update

sudo -u www-data wp core update