get-renderbuffer-internalformat: 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/get-renderbuffer-internalformat - from package: piglit

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

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