epoptes-client: 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/sbin/epoptes-client - from package: epoptes-client

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

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