ubuntu-distro-info: 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/ubuntu-distro-info - from package: distro-info

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

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