xfwrite: 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/xfwrite - from package: xfe

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

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