glsl-1.50-get-active-attrib-array: 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/glsl-1.50-get-active-attrib-array - from package: piglit

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

Error in other languages:
glsl-1.50-get-active-attrib-array: bevel nie gevind nie
glsl-1.50-get-active-attrib-array: comandă negăsită
glsl-1.50-get-active-attrib-array: comando não encontrado
glsl-1.50-get-active-attrib-array: commande introuvable
glsl-1.50-get-active-attrib-array: command not found
glsl-1.50-get-active-attrib-array: käsku ei ole
glsl-1.50-get-active-attrib-array: không tìm thấy lệnh
glsl-1.50-get-active-attrib-array: komanda nerasta
glsl-1.50-get-active-attrib-array: Kommando nicht gefunden.
glsl-1.50-get-active-attrib-array: kommandot finns inte
glsl-1.50-get-active-attrib-array: komut yok
glsl-1.50-get-active-attrib-array: nie znaleziono polecenia
glsl-1.50-get-active-attrib-array: níor aimsíodh an t-ordú
glsl-1.50-get-active-attrib-array: no se encontró la orden
glsl-1.50-get-active-attrib-array: no s'ha trobat l'ordre
glsl-1.50-get-active-attrib-array: opdracht niet gevonden
glsl-1.50-get-active-attrib-array: parancs nem található
glsl-1.50-get-active-attrib-array: perintah tidak ditemukan
glsl-1.50-get-active-attrib-array: príkaz nenájdený
glsl-1.50-get-active-attrib-array: příkaz nenalezen
glsl-1.50-get-active-attrib-array: команда не найдена
glsl-1.50-get-active-attrib-array: командата не е открита
glsl-1.50-get-active-attrib-array: 命令找不到
glsl-1.50-get-active-attrib-array: コマンドが見つかりません