depth-cube-map: 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/depth-cube-map - from package: piglit

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

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