ovdb_server: 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/lib/news/bin/ovdb_server - from package: inn2

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

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