arb_multisample-beginend: 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/lib64/piglit/bin/arb_multisample-beginend - from package: piglit

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

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