texrect-many: 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-many - from package: piglit

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

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