refdbnd: 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/refdbnd - from package: refdb-clients

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

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