fftest: 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/bin/fftest - from package: joystick

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

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