recoverdm: 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/recoverdm - from package: recoverdm

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

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