I recently upgraded my web server system from Fedora 17 to Fedora 18. I used fedup to do so. The upgrade went fairly smooth.
A couple days later I noticed that Apache ( httpd ) was not running. In the course of trouble shooting I had to disable selinux. When I enabled selinux again, there was a new issue.
The first issue I noticed is that by default, the ServerName directive in the apache config (httpd.conf) file is remarked out.
The error shows up as the following in your /var/log/httpd/error_log file.
Could not reliably determine the server’s fully qualified domain name
The solution for that error is to edit your /etc/httpd/conf/httpd.conf file.
Change the line (line 95 in my file) that reads
The next error:
No such file or directory: AH01762: Failed to create shared memory segment on file /run/httpd/authdigest_shm
Which had the following error hand in hand with it:
no such file or directory: AH01760: failed to initialize shm – all nonce-count checking, one-time nonces, and MD5-sess algorithm disabled
Both of these errors can be fixed by creating the /run/httpd directory and then changing the ownership to apache and group to apache. This seems to be a result of disabling and then enabling selinux.
chown -R apache /run/httpd
chgrp -R apache /run/httpd