xaumix: 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/xaumix - from package: aumix-common

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

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