getteximage-luminance: 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/getteximage-luminance - from package: piglit

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

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