fdmountd: 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/fdmountd - from package: fdutils

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

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