1) Check the error_log file.  Most errors will show up in
this file when start/restarting Apache.  This can help narrow down
what files you need to look at.



2) Check the hostname.  Make sure the machine knows it’s own
name.  Type ‘hostname’ and then check it against nslookup or
dig.  These should match for best results.



3) Check log file sizes.  Most Linux installations don’t care much
for files over 2GB.  You can check for these in your log
directories by “using du -a | sort -n -r | head -n 20”.  This will show you the 20 largest files in the current directory.