arb_draw_indirect-draw-arrays-instances: 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_draw_indirect-draw-arrays-instances - from package: piglit

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

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