The network started being unstable and was down every 4-8 hours. I think it’s because I made the CHMOD for the entire wordpress folder different from the default. Turns out CHMOD was not the problem, it was CHOWN. I am concerned that the overly expansive CHMOD may have compromised files in the WordPress installation.
I re-downloaded and untarred WordPress, CHOWN’ed the whole WordPress -RF to www-data (/var/www/aigohost.org/public_html/ CHOWN -Rf www-data wordpress) and CHMOD wp-content to 755. Hope this fixed it. But there could be othe issues, eg is the plugins or themes folder safe?