readbin: 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/readbin - from package: atlc

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

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