ekeyd: command not found

Have You tried accessing the binary with the full path?

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/ekeyd - from package: ekeyd

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