amd2sun: 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/sbin/amd2sun - from package: am-utils

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

Error in other languages:
amd2sun: bevel nie gevind nie
amd2sun: comandă negăsită
amd2sun: comando não encontrado
amd2sun: commande introuvable
amd2sun: command not found
amd2sun: käsku ei ole
amd2sun: không tìm thấy lệnh
amd2sun: komanda nerasta
amd2sun: Kommando nicht gefunden.
amd2sun: kommandot finns inte
amd2sun: komut yok
amd2sun: nie znaleziono polecenia
amd2sun: níor aimsíodh an t-ordú
amd2sun: no se encontró la orden
amd2sun: no s'ha trobat l'ordre
amd2sun: opdracht niet gevonden
amd2sun: parancs nem található
amd2sun: perintah tidak ditemukan
amd2sun: príkaz nenájdený
amd2sun: příkaz nenalezen
amd2sun: команда не найдена
amd2sun: командата не е открита
amd2sun: 命令找不到
amd2sun: コマンドが見つかりません