dfont2res: command not found

Have You tried accessing the binary with the full path?

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/dfont2res - from package: fondu

You may install the required package with command apt-get install {package}
Error in other languages:
dfont2res: bevel nie gevind nie
dfont2res: comandă negăsită
dfont2res: comando não encontrado
dfont2res: commande introuvable
dfont2res: command not found
dfont2res: käsku ei ole
dfont2res: không tìm thấy lệnh
dfont2res: komanda nerasta
dfont2res: Kommando nicht gefunden.
dfont2res: kommandot finns inte
dfont2res: komut yok
dfont2res: nie znaleziono polecenia
dfont2res: níor aimsíodh an t-ordú
dfont2res: no se encontró la orden
dfont2res: no s'ha trobat l'ordre
dfont2res: opdracht niet gevonden
dfont2res: parancs nem található
dfont2res: perintah tidak ditemukan
dfont2res: príkaz nenájdený
dfont2res: příkaz nenalezen
dfont2res: команда не найдена
dfont2res: командата не е открита
dfont2res: 命令找不到
dfont2res: コマンドが見つかりません