gob2: 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/gob2 - from package: gob2

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

On Debian possible default full paths are:

/usr/bin/gob2 - from package: gob2

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

Error in other languages:
gob2: bevel nie gevind nie
gob2: comandă negăsită
gob2: comando não encontrado
gob2: commande introuvable
gob2: command not found
gob2: käsku ei ole
gob2: không tìm thấy lệnh
gob2: komanda nerasta
gob2: Kommando nicht gefunden.
gob2: kommandot finns inte
gob2: komut yok
gob2: nie znaleziono polecenia
gob2: níor aimsíodh an t-ordú
gob2: no se encontró la orden
gob2: no s'ha trobat l'ordre
gob2: opdracht niet gevonden
gob2: parancs nem található
gob2: perintah tidak ditemukan
gob2: príkaz nenájdený
gob2: příkaz nenalezen
gob2: команда не найдена
gob2: командата не е открита
gob2: 命令找不到
gob2: コマンドが見つかりません