glx-pixmap-crosscheck: 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/glx-pixmap-crosscheck - from package: piglit

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

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