gadap-config: 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/gadap-config - from package: libgadap-dev

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

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