flix: 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/flix - from package: epix

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