[bakert@fenchurch ~]$ history | awk '{a[$2]++}END{for(i in a){print a[i] " " i}}' | sort -rn | head
24899 git
9575 vi
7366 cd
3929 ls
2517 php
2162 mate
2125 rsync
2022 cat
1950 ssh
1938 make
Compare to four years ago. New: git, php, mate, rsync, cat, make. Climbers: ls. Same: cd, ssh. Fallers: vi. Old: u, ruby, svn, td, mysql, gd.