Here's a gem that I found long back on the arch forums, before you use it you should have 7zip and unrar or other tools to handle the formats you need to extract.

# File extractor

# usage: extract <file>

extract ()

{

  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      ;;

      *.snz)       snunzip $1      ;;

      *)           echo "'$1' cannot be extracted via extract()" ;;

    esac

  else

    echo "'$1' is not a valid file"

  fi

}

To use it, you must add this to your .bash_profile or .profile after that is done you can use extract to decompress all sort of archives from the command line. The syntax is extract name-of-archive

You can use it with snappy too, you need to install this however before it'll work.