arb_geometry_shader4-vertices-in: 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/arb_geometry_shader4-vertices-in - from package: piglit

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

Error in other languages:
arb_geometry_shader4-vertices-in: bevel nie gevind nie
arb_geometry_shader4-vertices-in: comandă negăsită
arb_geometry_shader4-vertices-in: comando não encontrado
arb_geometry_shader4-vertices-in: commande introuvable
arb_geometry_shader4-vertices-in: command not found
arb_geometry_shader4-vertices-in: käsku ei ole
arb_geometry_shader4-vertices-in: không tìm thấy lệnh
arb_geometry_shader4-vertices-in: komanda nerasta
arb_geometry_shader4-vertices-in: Kommando nicht gefunden.
arb_geometry_shader4-vertices-in: kommandot finns inte
arb_geometry_shader4-vertices-in: komut yok
arb_geometry_shader4-vertices-in: nie znaleziono polecenia
arb_geometry_shader4-vertices-in: níor aimsíodh an t-ordú
arb_geometry_shader4-vertices-in: no se encontró la orden
arb_geometry_shader4-vertices-in: no s'ha trobat l'ordre
arb_geometry_shader4-vertices-in: opdracht niet gevonden
arb_geometry_shader4-vertices-in: parancs nem található
arb_geometry_shader4-vertices-in: perintah tidak ditemukan
arb_geometry_shader4-vertices-in: príkaz nenájdený
arb_geometry_shader4-vertices-in: příkaz nenalezen
arb_geometry_shader4-vertices-in: команда не найдена
arb_geometry_shader4-vertices-in: командата не е открита
arb_geometry_shader4-vertices-in: 命令找不到
arb_geometry_shader4-vertices-in: コマンドが見つかりません