arb_uniform_buffer_object-getuniformblockindex: 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_uniform_buffer_object-getuniformblockindex - from package: piglit

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

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