cyberjack: 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/cyberjack - from package: libifd-cyberjack6

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

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