switch on and off cntlm proxy on arch linux

proxy.sh

#!/usr/bin/env bash


# /etc/bash.bashrc

function proxyOff(){
            # stop cntlm service
            systemctl stop cntlm.service
            #remove all proxy env variables
            sed -i.bak '/proxy/d' /etc/environment
            # logout necessary to all gui non gui programs take changes
            killall -u $user
}

function proxyOn(){
        #make sure it's off
        proxyOff
        # start service
        systemctl start cntlm.service
        #declare env variables system wide
        echo 'http_proxy=http://localhost:3128' >> /etc/environment
        echo 'https_proxy=http://localhost:3128' >> /etc/environment
        echo 'ftp_proxy=http://localhost:3128' >> /etc/environment
        # logout necessary to all gui non gui programs take changes
        killall -u $user
}