mooproxy: 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/mooproxy - from package: mooproxy

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

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