flatboob: 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/flatboob - from package: weboob

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

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