# # ex = EXtractor for all kinds of archives
# # usage: ex <file>
ex ()
{
  if [ -f "$1" ] ; then
    case "$1" in
      *.tar.bz2)   tar xjf "$1"   ;;
      *.tar.gz)    tar xzf "$1"   ;;
      *.bz2)       bunzip2 "$1"   ;;
      *.rar)       unrar x "$1"   ;;
      *.gz)        gunzip "$1"    ;;
      *.tar)       tar xf "$1"    ;;
      *.tbz2)      tar xjf "$1"   ;;
      *.tgz)       tar xzf "$1"   ;;
      *.zip)       unzip "$1"     ;;
      *.Z)         uncompress "$1";;
      *.7z)        7z x "$1"      ;;
      *.deb)       ar x "$1"      ;;
      *.tar.xz)    tar xf "$1"    ;;
      *.tar.zst)   tar xf "$1"    ;;
      *)           echo "'$1' cannot be extracted via ex()" ;;
    esac
  else
    echo "'$1' is not a valid file"
  fi
}