Repo: 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/Repo - from package: quantlib-examples

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

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