Finally a meme I don't mind participating in. Sadly most of the interesting bits are hidden behind that "sudo".

% history -1000 | awk '{a[$2]++ } END{for(i in a){print a[i] " " i}}'|sort -rn|head
194 cd
156 sudo
73 rm
50 ls
45 less
44 vi
31 dpkg
22 kill
21 perl
21 man