I'm using linuxconf GUI for some operations, when i click on a certain option, it exits the GUI to the command line interface with a message "Segmentation fault (core dumped)"
how to over come this problem?

When a program gets a "Segmentaion fault" it usually means there is a serious programatic error. Programs encounter segmentation faults if they try to access resources that are not allocated to it. Since linuxconf is somewhat stable, the problem was likely caused by an error that it never expected, possibly an oddity in your machines configuration.
Due to the type of error, linuxconf probably never wrote out an error message

What to do?
If you don't know anything about programming -
Go find a newer version of linuxconf. It is possible that the problem may be fixed.

If you do know something about programming -
Get the source code for that version of linux conf. Build it with the debugging option and try to recreate the error. If you are able to recreate the error, then use gdb ( Debugger ) to load the core file that was dumped. Do a stack trace in gdb with the 'where' command. Look at the method where the failure occured, and most likely you will find what went wrong.

Good Luck