amaya@aenima>history|awk '{print $2}'|awk 'BEGIN {FS="|"} {print $1}'|sort|uniq -c|sort -rn|head -10
    151 ls
     65 cd
     50 mv
     23 debsign
     19 btshowmetainfo
     17 cat
     15 rm
     14 vi
     13 dupload
      9 attach

amaya@aenima>alias | grep attach
alias attach='screen -UxA'