ekey-setkey: 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/ekey-setkey - from package: ekeyd

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

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