rmt-dump: 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/rmt-dump - from package: dump

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

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