Most used shell commands

gistfile1.txt

history 1 | awk '{CMD[$2]++;count++;}END { for (a in CMD)print CMD[a] " " CMD[a]/count*100 "% " a;}' | grep -v "./" | column -c3 -s " " -t | sort -nr | nl |  head -n20     

     1	3427  34.2734%   git
     2	1168  11.6812%   ll
     3	1164  11.6412%   cd
     4	791   7.91079%   vi
     5	578   5.78058%   ack
     6	299   2.9903%    j
     7	257   2.57026%   cat
     8	250   2.50025%   python
     9	169   1.69017%   curl
    10	166   1.66017%   svn
    11	160   1.60016%   ..
    12	110   1.10011%   ..2
    13	97    0.970097%  rm
    14	78    0.780078%  nosetests
    15	56    0.560056%  which
    16	53    0.530053%  mv
    17	50    0.50005%   ..3
    18	49    0.490049%  mysql
    19	49    0.490049%  mkdir
    20	42    0.420042%  ipython