remastering a distribution is intended to meet a specific need for someone or party. it is made because no distribution meets their needs. this time i will explain remastersys available on ubuntu repository. first install remastersys

# apt-get install remastersys

the system will download the file and any program and libraries needed by remastersys and also install them. now let's make a change to the system for example we install kplayer

# apt-get install kplayer

again the system will download and install the program. then run remastersys or remastersys-gui for GUI

# remastersys-GUI

choose backup complete system including user data