fdsh: 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/fdsh - from package: fdclone

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

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