ad_config: 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/ad_config - from package: libadios-bin

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