savanna: 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 Debian possible default full paths are:

/usr/bin/savanna - from package: python-savannaclient

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

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