draw-vertices: 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/draw-vertices - from package: piglit

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

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