librarian-puppet: 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/librarian-puppet - from package: librarian-puppet

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

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