asgrad: 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/asgrad - from package: libAfterImage-devel

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

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