dibbler-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 CentOS possible default full paths are:

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

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

On Debian possible default full paths are:

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

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

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