cdvserver: command not found

Have You tried accessing the binary with the full path?

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/cdvserver - from package: codeville

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