texrect_simple_arb_texrect: 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/texrect_simple_arb_texrect - from package: piglit

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

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