clear-varray-2.0: 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/clear-varray-2.0 - from package: piglit

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

Error in other languages:
clear-varray-2.0: bevel nie gevind nie
clear-varray-2.0: comandă negăsită
clear-varray-2.0: comando não encontrado
clear-varray-2.0: commande introuvable
clear-varray-2.0: command not found
clear-varray-2.0: käsku ei ole
clear-varray-2.0: không tìm thấy lệnh
clear-varray-2.0: komanda nerasta
clear-varray-2.0: Kommando nicht gefunden.
clear-varray-2.0: kommandot finns inte
clear-varray-2.0: komut yok
clear-varray-2.0: nie znaleziono polecenia
clear-varray-2.0: níor aimsíodh an t-ordú
clear-varray-2.0: no se encontró la orden
clear-varray-2.0: no s'ha trobat l'ordre
clear-varray-2.0: opdracht niet gevonden
clear-varray-2.0: parancs nem található
clear-varray-2.0: perintah tidak ditemukan
clear-varray-2.0: príkaz nenájdený
clear-varray-2.0: příkaz nenalezen
clear-varray-2.0: команда не найдена
clear-varray-2.0: командата не е открита
clear-varray-2.0: 命令找不到
clear-varray-2.0: コマンドが見つかりません