unadf: 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/unadf - from package: unadf

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

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