drbl-kbdchooser: 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/share/drbl/sbin/drbl-kbdchooser - from package: drbl

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

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