kumotop: 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/kumotop - from package: kumofs

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

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