kmldonkey: 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/kmldonkey - from package: kmldonkey

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

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