rep: 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/rep - from package: rep

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

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