Not a good feeling when the server is down.
Nope. I actually get a sick feeling in the pit of my stomach knowing that every customer on the box is watching the minutes tick away until it's back up.
Miraculously, though, I've got it back up and running. I cannot make any sense of how or why, I can only share the order of events that took place, in case they are of some use to another host out there who runs into the same problem:
1. Running WHM 9.9.0 cPanel 9.9.0-C55 / RedHat 7.3 i686 - WHM X v3.1.0, I logged in to WHM and got a warning to run /scripts/easyapache for security purposes (to update PHP 4.3.8 to 4.3.9). I ran the script, chose "Option 5". Apache would not restart.
2. I attempted to update cPanel to latest "Current", but it didn't appear to work.
3. Tried restarting apache from WHM, no luck.
4. Saw that thousands of core dump files were created in /usr/local/apache and deleted them before it filled the drive.
5. Came here, posted, ran easyapache Option 1 at Squirrels suggestion
6. Wished I'd had some beer in the house.
7. Tried Option 4, no luck. Updated to WHM 9.9.0 cPanel 9.9.2-C6 seemed to be successful, still no apache though.
8. I replaced httpd.conf file with an older backup - Still no luck
9. Ran /scripts/easyapache Option 4 again, and this time it worked.
I'm absolutely dazed and confused as to what could have happened ro why this happens every time I run easyapache the past few times. But at least its back online and I'm breathing a little easier.