drawpix-z: 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/drawpix-z - from package: piglit

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

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