glsl-max-vertex-attrib: command not found

Have You tried accessing the binary with the full path?

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-max-vertex-attrib - from package: piglit

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