Machine Learns

Open ~/.bashrc file with your favorite editor and paste below script to the bottom of the file.

extract () {
if [ -f 1 in
     *.tar.bz2) tar xvjf 1 ;;
     *.bz2) bunzip2 1 ;;
     *.gz) gunzip 1 ;;
     *.tbz2) tar xvjf 1 ;;
     *.zip) unzip 1 ;;
     *.7z) 7z x 1'..." ;;
   esac
else
   echo "'$1' is not a valid file!"
fi
}

then write “extract” on console with the file you want to extract and see the effect.

extract bla.tar.gz