prelude-manager: 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/prelude-manager - from package: prelude-manager

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

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