glsl-orangebook-ch06-bump: 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/glsl-orangebook-ch06-bump - from package: piglit

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

Error in other languages:
glsl-orangebook-ch06-bump: bevel nie gevind nie
glsl-orangebook-ch06-bump: comandă negăsită
glsl-orangebook-ch06-bump: comando não encontrado
glsl-orangebook-ch06-bump: commande introuvable
glsl-orangebook-ch06-bump: command not found
glsl-orangebook-ch06-bump: käsku ei ole
glsl-orangebook-ch06-bump: không tìm thấy lệnh
glsl-orangebook-ch06-bump: komanda nerasta
glsl-orangebook-ch06-bump: Kommando nicht gefunden.
glsl-orangebook-ch06-bump: kommandot finns inte
glsl-orangebook-ch06-bump: komut yok
glsl-orangebook-ch06-bump: nie znaleziono polecenia
glsl-orangebook-ch06-bump: níor aimsíodh an t-ordú
glsl-orangebook-ch06-bump: no se encontró la orden
glsl-orangebook-ch06-bump: no s'ha trobat l'ordre
glsl-orangebook-ch06-bump: opdracht niet gevonden
glsl-orangebook-ch06-bump: parancs nem található
glsl-orangebook-ch06-bump: perintah tidak ditemukan
glsl-orangebook-ch06-bump: príkaz nenájdený
glsl-orangebook-ch06-bump: příkaz nenalezen
glsl-orangebook-ch06-bump: команда не найдена
glsl-orangebook-ch06-bump: командата не е открита
glsl-orangebook-ch06-bump: 命令找不到
glsl-orangebook-ch06-bump: コマンドが見つかりません