Install Go Lang on Raspberry Pi

install_go_pi.sh

cd $HOME
FileName='go1.13.4.linux-armv6l.tar.gz'
wget https://dl.google.com/go/$FileName
sudo tar -C /usr/local -xvf $FileName
cat >> ~/.bashrc << 'EOF'
export GOPATH=$HOME/go
export PATH=/usr/local/go/bin:$PATH:$GOPATH/bin
EOF
source ~/.bashrc

Universal script for the LATEST golang version Raspberry (updated for Pi 5)

Uses the latest golang version endpoint

#!/usr/bin/env bash

read -p "Press any key to delete the previous golang installation (if present)..."
sudo rm -rfv "/usr/local/go"
mkdir -p $HOME/go

# detect if on a 32bit or 64bit OS
if [[ $(uname -m) == aarch64 ]]; then
    ARCH="arm64"
else
    ARCH="armv6l"
fi

cd /tmp

# see https://stackoverflow.com/a/46624091/191246
version=$(curl -s 'https://go.dev/VERSION?m=text' | head -n 1)

fileName="${version}.linux-${ARCH}.tar.gz"
read -p "Press any key to download and unpack $fileName... "
wget -c https://go.dev/dl/$fileName && sudo tar -C /usr/local -xvf $fileName

# add bash env vars if not already present
grep -q 'GOPATH=' ~/.bashrc || cat >> ~/.bashrc << 'EOF'
export GOPATH=$HOME/go
export PATH=/usr/local/go/bin:$PATH:$GOPATH/bin
EOF

source ~/.bashrc

read -p "Press any key to delete downloaded file: $fileName..."
rm -rf "$fileName"