felix.jar: 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/share/felix-framework/bin/felix.jar - from package: felix-main

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

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