cdv-agent: 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/cdv-agent - from package: codeville

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

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