This shell script uninstalls rvm that has been install for multiuser installations using the installation script https://gist.github.com/ksinkar/4760796

rvm_global_uninstall.sh

#!/bin/bash

    # Copyright(C) 2012 Koustubh Sinkar

    # This program is free software: you can redistribute it and/or modify
    # it under the terms of the GNU General Public License as published by
    # the Free Software Foundation, either version 3 of the License, or
    # (at your option) any later version.

    # This program is distributed in the hope that it will be useful,
    # but WITHOUT ANY WARRANTY; without even the implied warranty of
    # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    # GNU General Public License for more details.

    # You should have received a copy of the GNU General Public License
    # along with this program. If not, see <http://www.gnu.org/licenses/

usage="\nUSAGE:\t\t ./rvm_global_uninstall.sh [options]\n\nDESCRIPTION:\t This script is for removing the default RVM setup preferred by Koustubh Sinkar on any *nix computer that he has setup\n\nOPTIONS:\n\t -x\t executes the installation script\n\t -h \t displays this help"

while getopts "xh" opt; do
    case $opt in
	x)
	    user=`whoami`
	    if [ $user != 'root' ]; then
		echo -e "You are not root/su. Please login again as root and rerun the script or run the script using sudo.\n"
		exit
	    fi

	    echo "Deleting the rvm installation files"
	    rm -rf $HOME/.rvm $HOME/.rvmrc /etc/rvmrc /etc/profile.d/rvm.sh /usr/local/rvm /usr/local/bin/rvm
	    echo "Deleting group rvm"
	    groupdel rvm
	    echo "Deleting the user rvmuser who was the manager of the global rvm installation"
	    userdel --remove rvmuser
	    echo "RVM is removed. Please check all .bashrc|.bash_profile|.profile|.zshrc for RVM source lines and delete
or comment out if this was a Per-User installation."
	    exit
	    ;;
	h)
	    echo -e $usage
	    exit
	    ;;
	*)
	    echo -e $usage
	    exit
	    ;;
    esac
done
	    
echo -e $usage