debian-installer-launcher: 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/sbin/debian-installer-launcher - from package: debian-installer-launcher

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

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