dibbler-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 CentOS possible default full paths are:

/usr/sbin/dibbler-server - from package: dibbler-server

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/sbin/dibbler-server - from package: dibbler-server

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

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