x2goclient: 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/x2goclient - from package: x2goclient

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

On Debian possible default full paths are:

/usr/bin/x2goclient - from package: x2goclient

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

Error in other languages:
x2goclient: bevel nie gevind nie
x2goclient: comandă negăsită
x2goclient: comando não encontrado
x2goclient: commande introuvable
x2goclient: command not found
x2goclient: käsku ei ole
x2goclient: không tìm thấy lệnh
x2goclient: komanda nerasta
x2goclient: Kommando nicht gefunden.
x2goclient: kommandot finns inte
x2goclient: komut yok
x2goclient: nie znaleziono polecenia
x2goclient: níor aimsíodh an t-ordú
x2goclient: no se encontró la orden
x2goclient: no s'ha trobat l'ordre
x2goclient: opdracht niet gevonden
x2goclient: parancs nem található
x2goclient: perintah tidak ditemukan
x2goclient: príkaz nenájdený
x2goclient: příkaz nenalezen
x2goclient: команда не найдена
x2goclient: командата не е открита
x2goclient: 命令找不到
x2goclient: コマンドが見つかりません