directfb-csource: 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/directfb-csource - from package: directfb-devel

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

On Debian possible default full paths are:

/usr/bin/directfb-csource - from package: libdirectfb-dev

You may install the required package with command apt-get install {package}

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