gnt-job: command not found

Have You tried accessing the binary with the full path?

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 Debian possible default full paths are:

/usr/sbin/gnt-job - from package: ganeti

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