Configuration / RPC Interface

When I'm supposed to enter the following in terminal...

mkdir -p ~/.zcash
echo "addnode=mainnet.z.cash" >~/.zcash/zcash.conf
echo "rpcuser=username" >>~/.zcash/zcash.conf
echo "rpcpassword=`head -c 32 /dev/urandom | base64`" >>~/.zcash/zcash.conf

I'm just wondering if I am supposed to change username and `head to a personal user-name and password?

Thanks <33

P.S. I've reached my max posts for the day, so that is why I won't respond if I don't respond.