texelFetch: 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/texelFetch - from package: piglit

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

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