hppd.service starup error
How can I fix this error? I installed my commercial SSL certificate and tried to restart httpd.service and it fails. When I look at journalctl, I see a kernel error: EXT4-fs (sda): couldn't mount as ext3 due to feature incompatibilities. I had Linode setup my server.
I think a good next troubleshooting step for you to take would be to look at httpd's logs. Here's some specific commands you can run to review the most recent log messages it's created:
sudo systemctl status httpd -l
sudo journalctl -u httpd --no-pager | tail -20
sudo tail -20 /var/log/httpd/error.log
It doesn't seem to me that the error you found previously from journalctl will explain the current issue. It's saying that the server had some trouble mounting your disk at some point, probably during the last boot. Having said that, the disk probably mounted normally eventually; otherwise, you probably wouldn't be able to SSH in and run commands at all.