Lynkeos: 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/bin/Lynkeos - from package: lynkeos.app

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