History meme

I've noticed several other people showing their most frequently used shell commands so here it is from a few of my systems.
One of my spamtraps that publishes all the data to a webpage at http://www.spameatingmonkey.net :
selfishman@spamtrap:~$ history|awk '{a[$2]++} END{for(i in a){printf "%5d\t%s \n",a[i],i}}'|sort -rn|head
137   vi
46   ls
39   exit
29   /etc/init.d/qpsmtpd
27   cd
25   dig
23   tail
23   sudo
16   mysql
13   ps

The system [...]