rrep: 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/rrep - from package: rrep

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

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