affsign: 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/affsign - from package: afflib-tools

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

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