aqbanking-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 CentOS possible default full paths are:

/usr/bin/aqbanking-config - from package: aqbanking-devel

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/aqbanking-config - from package: libaqbanking34-dev

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

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