% bash < <(curl -s -S -L https://raw.githubusercontent.com/moovweb/gvm/master/binscripts/gvm-installer)
% vi .bashrc
if [[ -f $HOME/.gvm/scripts/gvm ]] ; then
source $HOME/.gvm/scripts/gvm
fi
% gvm install go1.4
% gvm install go1.10
% gvm use go1.10 --default