license: 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/license - from package: liblicense-cli

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

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