iecset: 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 CentOS possible default full paths are:

/usr/bin/iecset - from package: alsa-utils

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/iecset - from package: alsa-utils

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

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