Use the WP CLI to update a wordpress site url, home url, and the DB references.

wordpress-change-site-name.sh

# Note the current urls to later be used in DB update
# use the flag --allow-root if only have a root user
wp option get siteurl 
wp option get home --allow-root

wp option update home 'https://example.com'
wp option update siteurl 'https://example.com' 

# Search and replace all the old urls to reference the new one
wp search-replace 'http://example.test' 'http://example.com'

# Restart webserver
service apache2 restart