alias ..='cd ..'
  alias ...='cd ../..'
  alias ....='cd ../../..'
  alias .....='cd ../../../..'
  alias ......='cd ../../../../..'
   
  # search history (??) and processes (???)
  alias '?=fc -li 1'
  alias '??=fc -li 1 | grep '
  alias '???=ps-grep'
   
  alias m='less'
   
  alias su='sudo -H -s'
   
  # move to trash rather than deleting
  rm='trash-put -v'
   
  # simplify hard to remember command names
  alias pk-show='apt-cache show'
  alias pk-install='sudo apt-get install'
  alias pk-update='sudo apt-get update'
  alias pk-update-upgrade='sudo apt-get update && sudo apt-get upgrade'
  alias pk-uu=pk-update-upgrade
  alias pk-remove='sudo apt-get remove'
  alias pk-debinst='sudo dpkg -i'
  pk-search () {
    apt-cache search $1 | sort | egrep "${1}|$"
  }