$ history | awk '{a[$2]++}END{for(i in a){print a[i] " " i}}' | sort -rn | head
114 ping
107 sudo
82 ssh
71 top
71 cd
68 iwconfig
56 ls
46 usbkey.sh
43 ps
33 evolution

The output shows what commands you type the most, usbkey.sh is a script to unlock the secret-keys held on my usb key-fob, sudo is high up probably cause I use sudo to bounce services (the intel wireless drive crashes quite alot and both it and Network Manager then need restarting) and evolution needs a shutdown every now and again The other commands are fairly self-explanatory.

So what’s your history?