$ uname -a
Linux vmgentoo 2.6.22-gentoo-r2 #1 SMP Fri Aug 17 16:56:49 EST 2007 i686 Intel(R) Core(TM)2 Duo CPU T7500 @ 2.20GHz GenuineIntel GNU/Linux

$ history | awk '{print $2}' | sort | uniq -c | sort -rn | head
    132 ls
     91 cd
     25 svn
     25 ssh
     18 vim
     18 eix
     15 screen
     12 make
     11 unison
     10 hfc

As root

# history | awk '{print $2}' | sort | uniq -c | sort -rn | head
    107 ls
     82 emerge
     40 lsof
     37 cd
     20 vim
     20 ps
     19 dispatch-conf
     18 route
     11 kill
     10 svn

Interesting notes:

1. ls came top in both user and root — probably because I can never remember what do I have in the current directory.
2. hfc is a devel script at work that compile a Python script into byte-code, marshal.dump() and then GPG-sign the result so I can “hotfix” a running instance of a product we develop.
3. I probably have used way too much Subversion. Should have start looking at alternatives.
4. Participating in geeky meme is just another way to procrastinate without doing any real work…