coretest_blit2: 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/bin/coretest_blit2 - from package: directfb

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

Error in other languages:
coretest_blit2: bevel nie gevind nie
coretest_blit2: comandă negăsită
coretest_blit2: comando não encontrado
coretest_blit2: commande introuvable
coretest_blit2: command not found
coretest_blit2: käsku ei ole
coretest_blit2: không tìm thấy lệnh
coretest_blit2: komanda nerasta
coretest_blit2: Kommando nicht gefunden.
coretest_blit2: kommandot finns inte
coretest_blit2: komut yok
coretest_blit2: nie znaleziono polecenia
coretest_blit2: níor aimsíodh an t-ordú
coretest_blit2: no se encontró la orden
coretest_blit2: no s'ha trobat l'ordre
coretest_blit2: opdracht niet gevonden
coretest_blit2: parancs nem található
coretest_blit2: perintah tidak ditemukan
coretest_blit2: príkaz nenájdený
coretest_blit2: příkaz nenalezen
coretest_blit2: команда не найдена
coretest_blit2: командата не е открита
coretest_blit2: 命令找不到
coretest_blit2: コマンドが見つかりません