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True greatness is measured by how much freedom you give to others, not by how much you can coerce others to do what you want. --Larry Wall

Test your IQ

Do you know from where can you download the Linux Kernel?
Yes, from the The Linux Kernel Archives at http://www.kernel.org/pub/

Guess the first major film produced on Linux servers ?
Hint:: it was release in 1997 and starts with letter T

What will happen if you run the following command below?
~$ sudo kill -9 1

Linux Command Tip of the Day::

Today's article::

Linux Kernel recompilation with GRSECURITY
To recompile the linux kernel, Upgrade to at *least* these software revisions before thinking you've encountered a bug! If you're unsure what version you're currently running, the suggested command should tell you. Grsecurity is an innovative approach to security utilizing a multi-layered detection, prevention, and containment model. It is licensed under the GPL. More ... Linux-Kernel-recompilation-with-GRSECURITY

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Linux Basics

LVM Basics
In LVM, Volume Groups (VGs) are split up into logical volumes (LVs), where the filesystems ultimately reside. See Figure Below.

Crontab
crontab - maintain crontab files for individual users. If the cron.allow file exists, then you must be listed therein in order to be allowed to use this command. If the cron.allow file does not exist but the cron.deny file does exist, then you must not be listed in the cron.deny file in order to use this command. If neither of these files exists, only the super user will be allowed to use this command. See Figure Below for Syntax.

Some of the more important parts of the Linux kernel
The Linux kernel consists of several important parts: process management, memory management, hardware device drivers, filesystem drivers, network management, and various other bits and pieces. Figure shows some of them.

Linux boot process
When a boot device is found, the first-stage boot loader is loaded into RAM and executed. This boot loader is less than 512 bytes in length (a single sector), and its job is to load the second-stage boot loader. Booting Linux begins in the BIOS at address 0xFFFF0. The first step of the BIOS is the power-on self test (POST). The job of the POST is to perform a check of the hardware. The second step of the BIOS is local device enumeration and initialization.

The primary boot loader that resides in the MBR is a 512-byte image containing both program code and a small partition table see Figure.

Todays Tips

1 Kilobyte (KB) = 1,024 bytes
1 Megabyte (MB) = 1,048,576 bytes = 1,024 KB
1 Gigabyte (GB) = 1,073,741,824 bytes = 1,048,576 KB = 1,024 MB
1 Terabyte (TB) = 1,099,511,627,776 bytes = 1,073,741,824 KB = 1,048,576 MB = 1,024 GB