prelude-correlator: 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/prelude-correlator - from package: prelude-correlator

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

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