Wp-cli

baixando wp-cli

curl -O https://raw.githubusercontent.com/wp-cli/builds/gh-pages/phar/wp-cli.phar
chmod +x wp-cli.phar
mv wp-cli.phar /usr/local/bin/wp

atualiza o core

php wp-cli.phar --path=/home/jmcultural/www/ core update

atualiza todos os plugins

php wp-cli.phar --path=/home/jmcultural/www/ plugin update --all

Referências

• http://wp-cli.org/
• http://wp-cli.org/commands/theme/update/
• http://wp-cli.org/commands/plugin/update/