as10k1: 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/as10k1 - from package: alsa-tools

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

Error in other languages:
as10k1: bevel nie gevind nie
as10k1: comandă negăsită
as10k1: comando não encontrado
as10k1: commande introuvable
as10k1: command not found
as10k1: käsku ei ole
as10k1: không tìm thấy lệnh
as10k1: komanda nerasta
as10k1: Kommando nicht gefunden.
as10k1: kommandot finns inte
as10k1: komut yok
as10k1: nie znaleziono polecenia
as10k1: níor aimsíodh an t-ordú
as10k1: no se encontró la orden
as10k1: no s'ha trobat l'ordre
as10k1: opdracht niet gevonden
as10k1: parancs nem található
as10k1: perintah tidak ditemukan
as10k1: príkaz nenájdený
as10k1: příkaz nenalezen
as10k1: команда не найдена
as10k1: командата не е открита
as10k1: 命令找不到
as10k1: コマンドが見つかりません