Hi there,i moved to linux since march 2005 and i find it much better.But i have question that when developer in windows,develops software,his aplications information and some values are stored in Windwos Registry.Windows Registry is very complex thing which stores information about your hardware,user groups and applications installed etc.
When any program is uninstalled some of its values remains within registry and not deleted,so apps like registry cleaner comes to rescue.These apps oonly delete entries which have broken values.So many applcations leave junk values behind.So many entries filled in windows makes it unusable,as Registry takes time to load windows,so performance of windows decreases.So user needs to delete some entries manually or have to remove start-up entries for those programs.

Ok that was about windows.Now i have questions like:
1) Is there any thing like registry in linux?Where linux stores such information?
2) When application is uninstalled in linux,all the values and files related to applications are removed or remains?
3) Where can i find information about startup programs?How can i edit entries of startup programs?
Please help.Thanks in advance.

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1) Is there any thing like registry in linux?Where linux stores such information?

In Linux systemwide settings or default settings for programs are stored in /etc/ for example settings for mplayer is stored in /etc/mplayer/mplayer.conf

If you want to have a diffrent set of settings for your user they are stored in a directory or file in your homedirectore. for example ~/.mplayer ( ~ designates the home-directory of the current user)

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2) When application is uninstalled in linux,all the values and files related to applications are removed or remains?

That depends... in a Debian system... if you uninstall an application with apt-get remove applicationname --purge all settings in /etc/ will be removed if you do it without the --purge the settings will remain. Settings stored in each users home-directory is allways left alone.

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3) Where can i find information about startup programs?How can i edit entries of startup programs?

Programs that start when Linux starts is usually linked from a directory /etc/rc#.d/ where # is a number between 0 and 6 or the letter S

Those diffrent directories are diffrent "runlevels" and start diffrent services. This process is not ecactly the same for diffrent flavours of Linux. You can read about the Debian way here: http://www.debian.org/doc/manuals/referenc....en.html#s-boot

And here are some links to more gerneral information.

http://www.skullbox.net/init.php

http://www.iodynamics.com/education/runlevel.html

There should be graphical utilities for administrin these things but I don't use them myself so I don't know the names of them but if I run across some I'll post them here.

/LinuxSam