vs-point_size-zero: 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/vs-point_size-zero - from package: piglit

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

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