On a server with many domains it can be difficult to determine which sites are taking the most traffic. Here’s a one-line that will generate a nice report:
find /var/log/httpd/ -name '*access.log' | \
xargs grep --color `date +%d/%b` | \
cut -d: -f1 | uniq -c | sort -n -r
This assumes that (a) log files are in /var/log/httpd, (b) log file names end with “access.log” and that each domain has it’s own access list.