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tutorial - How to compile Linux kernel

You should be root when running any of the below mentioned commands.
First go to the below link and find the latest kernel version. Currently its - linux-2.6.26

Download it using wget
# wget http://www.kernel.org/pub/linux/kernel/v2.6/linux-2.6.26.tar.gz

And copy it under /usr/src
# cp linux-2.6.26.tar.gz /usr/src

Go to this directory
# cd /usr/src

And extract the kernel from the compressed file. This command will create a new folder called linux-2.6.26
# tar zxf linux-2.6.26.tar.gz

Now go to the directory that contains your new kernel
# cd linux-2.6.26

And get your old configuration
# make oldconfig

If you have qt libraries installed on your system run # make xconfig. This is the graphical configuration system through which you will make all the necessary changes in your kernel. If you have only ncurses installed you may run # make menuconfig
# make xconfig or # make menuconfig

When you have configured everything run make to start compiling your kernel
# make

Then run make modules_install to install your new modules created above.
# make modules_install

And finally create all the necessary files under /boot and also configure grub to include your new kernel
# make install

Reboot and from grub choose the new kernel! If anything goes wrong it means you have made a mistake in the kernel configuration. Boot in with your old kernel and run again make xconfig to do the appropriate changes.
# reboot

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source:http://linuxpoison.blogspot.com/2008/07/135781758016013.html

tutorial - Bastille Linux - Installation and configuration

Installing Bastille is easy, since many distributions come with Bastille available as a package, like Debian, Gentoo and Red Hat Fedora. You can also download Bastille in the form of an RPM or as a source file. There are some pre-requisites you will need if you want to run Bastille in Hardening mode (you can run Bastille in Assessment mode without these). These are:

    * perl-Tk and perl-Curses,

    * perl-Tk for Bastille in GUI mode

    * and perl-Curses for the command-line mode.

You can find these pre-requisites in RPM form, or you can install them via CPAN.

After these pre-requisites are installed, you can install Bastille, for example via RPM as:

# rpm -ivh Bastille-3.0.9-1.0.noarch.rpm

Bastille is then executed by running the bastille binary. Run the command with the -x option for GUI Hardening mode, with the -c option for command-line Hardening mode. If you just want to run Bastille in Assessment mode, then run the bastille binary with the –assess option. This will assess the host and then try to launch a browser to display the resulting report. If you do not wish to display the report, you can run Bastille with the –assessnobrowser option, which just generates the report and does not launch a browser. If you wish to revert an already hardened host you can use the -r option like so:

# bastille -r

Bastille can be a powerful tool, particularly for ensuring a consistent security baseline on your Linux hosts. It doesn’t guarantee that your host is secured against all threats, but it does take care of a lot of configuration weaknesses and security configuration that can be time-consuming and complicated. Bastille’s model also means that you can apply the same controls on a number of hosts in a consistent and structured manner. The broad platform and distribution coverage available in the application also means that you can easily harden a variety of hosts without having to worry about differing configuration standards, file locations and default settings. Finally, any tool that helps you with the process of hardening and securing your hosts with the minimum of effort, especially when IT and security resources are sometimes stretched thin, is well worth investing in time to understand and implement.

source:http://linuxpoison.blogspot.com/2008/07/135781758016473.html

tutorial - How to compile Linux kernel

tutorial - Bastille Linux - Installation and configuration

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