Category: Troubleshooting

Cpanel – SSL’s hostnames are required to have DNS entries

tl;dr When cPanel starts up, if it doesn’t have a valid SSL (now valid properly signed SSL) it reissues it’s own SSL, or panics if it cannot. cPanel is now requiring a valid hostname check (similar to Let’s Encrypt) as a part of that check. Therefore, a server’s hostname now has to point at the…


IO wait Load Tracking

From http://balajitheone.blogspot.com IO wait load tracking to a process. How to identify what processes are generating I/O wait load. ————————————————————- An easy way to identify what process is generating your IO Wait load is to enable block I/O debugging. This is done by setting /proc/sys/vm/block_dump to a non zero value like: echo 1 > /proc/sys/vm/block_dump…