go: command not found

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On CentOS possible default full paths are:

/usr/bin/go - from package: golang-bin
/usr/lib/golang/bin/go - from package: golang-bin

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/go - from package: golang-go

You may install the required package with command apt-get install {package}

Error in other languages:
go: bevel nie gevind nie
go: comandă negăsită
go: comando não encontrado
go: commande introuvable
go: command not found
go: käsku ei ole
go: không tìm thấy lệnh
go: komanda nerasta
go: Kommando nicht gefunden.
go: kommandot finns inte
go: komut yok
go: nie znaleziono polecenia
go: níor aimsíodh an t-ordú
go: no se encontró la orden
go: no s'ha trobat l'ordre
go: opdracht niet gevonden
go: parancs nem található
go: perintah tidak ditemukan
go: príkaz nenájdený
go: příkaz nenalezen
go: команда не найдена
go: командата не е открита
go: 命令找不到
go: コマンドが見つかりません