auto-apt: 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/auto-apt - from package: auto-apt

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