how to tar/zip/untar/unzip

.bashrc

# function for .bashrc to facilitate (extraction of archive|archiving of file)

# extract based on the file extension.
function extract(){
	if [ -f $1 ] ; then
		case $1 in
		  *.tar.bz2)   tar xvjf $1     ;;
			*.tar.gz)    tar xvzf $1     ;;
			*.bz2)       bunzip2 $1      ;;
			*.rar)       unrar x $1      ;;
			*.gz)        gunzip $1       ;;
			*.tar)       tar xvf $1      ;;
			*.tbz2)      tar xvjf $1     ;;
			*.tgz)       tar xvzf $1     ;;
			*.zip)       unzip $1        ;;
			*.Z)         uncompress $1   ;;
			*.7z)        7z x $1         ;;
			*)           echo "'$1' cannot be extracted via >extract<" ;;
		esac
	else
		echo "'$1' is not a valid file!"
	fi
}

# creates an archive (*.tar.gz) from given directory.
function maketar() { tar cvzf "${1%%/}.tar.gz"  "${1%%/}/"; }

# create a ZIP archive of a file or folder.
function makezip() { zip -r "${1%%/}.zip" "$1" ; }