Download latest go binary from golang.org/dl. In this case, version 1.11.5.
Remove any existing installation, run:
if [ -d /usr/local/go ]; then sudo rm -r /usr/local/go; fi
Extract to /usr/local, run:
sudo tar -C /usr/local -xzf go1.11.5.linux-amd64.tar.gz
Create go home dir if doesn't already exist, run:
if [ ! -d $HOME/go ]; then mkdir $HOME/go; fi
Edit ~/.profile, run:
nano ~/.profile
Append the following, then save/exit:
export PATH=$PATH:/usr/local/go/bin
export GOPATH=$(go env GOPATH)
export PATH=$PATH:$GOPATH/bin
Source updated profile, run:
source ~/.profile
To install dep for dependency management, run:
curl https://raw.githubusercontent.com/golang/dep/master/install.sh | sh
For other OS/environments, refer to the Dep Installation Documentation.