xdfformat: 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/xdfformat - from package: fdutils

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

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