ebncheck: 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/sbin/ebncheck - from package: ebnetd

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

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