kumo-manager: 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/sbin/kumo-manager - from package: kumofs

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

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