Free kernel software for linux

POE::Kernel is an event driven threaded application kernel in Perl.

SYNOPSIS

POE comes with its own event loop, which is based on select() and written entirely in Perl. To use it, simply:

use POE;

POE can adapt itself to work with other event loops and I/O multiplex systems. Currently it adapts to Gtk, Tk, Event.pm, or IO::Poll when one of those modules is used before POE::Kernel.

use Gtk; # Or Tk, Event, or IO::Poll;
use POE;

or

use POE qw(Loop::Gtk);

or

use POE::Kernel { loop => "Gtk" };
use POE::Session;

Methods to manage the process global Kernel instance:

# Retrieve the kernels unique identifier.
$kernel_id = $kernel->ID;

# Run the event loop, only returning when it has no more sessions to
# dispatch events to. Supports two forms.
$poe_kernel->run();
POE::Kernel->run();

FIFO event methods:

# Post an event to an arbitrary session.
$kernel->post( $session, $event, @event_args );

# Post an event back to the current session.
$kernel->yield( $event, @event_args );

# Call an event handler synchronously. Bypasses POEs event queue
# and returns the handlers return value.
$handler_result = $kernel->call( $session, $event, @event_args );

Original alarm and delay methods:

# Post an event which will be delivered at a given Unix epoch time.
# This clears previous timed events with the same state name.
$kernel->alarm( $event, $epoch_time, @event_args );

# Post an additional alarm, leaving existing ones in the queue.
$kernel->alarm_add( $event, $epoch_time, @event_args );

# Post an event which will be delivered after a delay, specified in
# seconds hence. This clears previous timed events with the same
# name.
$kernel->delay( $event, $seconds, @event_args );

# Post an additional delay, leaving existing ones in the queue.
$kernel->delay_add( $event, $seconds, @event_args );

Install Kernel interfaces with the Linux operating system by running a series of functions or groups of commands that automate the compiling or recompiling and installation process.
Install Kernel project consists of three groups of functions: building the kernel and moving files, checking dependencies, and editing the boot loader configuration file. Grouping all of the functions in these three groups makes maintaining and altering the script much easier.
Install Kernel can also be considered a program, because a program does checking and makes choices accordingly. A script is usually a file, which contains a certain number of commands with no logic in mind. Therefore, while ik is technically a script, it can also be called a program.
Dependency checks are to make sure the current system configuration and settings are properly setup before proceeding with the kernel build. There are seven dependency checks, they are: a root check, space check, link check, boot check, boot loader check, configuration check, and a module check.
First, the root check makes sure the user is a super user; which means they are capable of editing important system files only accessible to the root account. The space check makes sure there is at least 200 megabytes available.
The kernel source these days is around 150 megabytes just for the source code. When one compiles the kernel, it may increase the size to 50 megabytes or more. Therefore, ik
checks for at least 200MB available in order to successfully compile the kernel without running out of space. Next, it is not required, but it is standard to have a symbolic link of /usr/src/linux pointing to /usr/src/linux-x.y.z.
The fourth check makes sure the user has a /boot directory, this is where the Linux kernel files will be installed to. The fifth check determines the bootloader that will be used. There are two main boot loaders in Linux. LILO and GRUB are the two most popular for booting the operating system.
This check accurately finds whether the kernel was booted from either LILO or GRUB by checking which bootloader was used last. It then tells the rest of the script to edit the correct one accordingly. The sixth configuration check is to make sure users have created a proper kernel configuration file, which is used in the process of building the Linux kernel.
The final check is a module check, if modules are turned off, the script will determine this and alter the installation process to install with no module support. The main idea behind the depdency checks is to make sure the user cannot damage his or her system if they do not do something right.
The installation process also contains seven functions. The installation process is usually several commands. However, because of the differences that can occur in a users configuration file, each part of the building process must be checked and the building process may need to be altered.
The first function makes sure the dependencies are setup correctly for all files in the kernel source tree. The second function deletes stale object files and or old kernel files. Next, the third function is the kernel build function; this function runs a command to build the Linux kernel. Next, functions four and five make and install modules if the user had specified module support in his or her kernel configuration file.
The sixth function moves the Linux kernel and its System dependency map to the boot partition. The last function of the build process sets up module dependencies for the new kernel if modules were defined. The installation process also includes a small error check for each part of the kernel build process.
If any part of the kernel build process fails; the script will abort, not modifying any boot loader configuration files. This is important; because if it did not abort, it may alter the boot loader configuration files, thus rendering the system unbootable. It is important to support every Linux configuration possible because of the wide use of this script.
The boot loader configuration and setup process is probably the most important aspect of installing a new kernel. An improper boot loader configuration may leave one with system that does not boot; or simply does not boot the new kernel.
It is also important, as some systems may have two or more boot loaders installed. There are four functions defined for this process. The first function uses the boot loader, which was defined during the configuration checks. The second function defines where the LILO or GRUB configuration files are located.
Next, depending on which boot loader is found, either LILO or GRUB configuration files are edited automatically by sed. Sed is a stream editor, which edits a file with no user intervention. If user intervention were required, the user would have to be present between certain parts of the kernel installation. With ik, it makes efficient use of a users time because only one command needs to be entered to complete the entire installation and setup process.
Install Kernel is a useful tool for those who are new to Linux, rebuild their kernel often, or value their time. It reduces the commands for installing the kernel from about thirteen to one. Users new to Linux may find this attractive.
This is because the entire process is automated; and if something is not correct, in most cases ik will notify the user what is incorrect, and how to fix the error. On the other side, for experienced users who do not wish to spend valuable time installing a new kernel, this is also very handy. Install Kernel is efficient by requiring no user intervention and reducing time spent on kernel installs, and effective by giving new to Linux the option for an easy kernel upgrade.
Enhancements:
- Updated to work with the newer version of coreutils for head and tail.
- The MAKE_JOBS directive has been removed in favor of make -j2 to prevent make from spawning hundreds of jobs if /proc/cpuinfo did not exist.

gnome-kernel-manager is a tool for managing kernel modules and more.
gnome-kernel-manager is a gui for managing the kernel modules, .... Only Linux kernel is supported.
Main features:
- Shows the list of loaded modules.
- Shows the list of all installed modules.
- Shows information about modules.
- Supports (un)loading modules.

xlike Kernel Patchset is a patch collection for the Linux vanilla kernel. The project includes as many stable enhancements for the Linux kernel as possible.
These include code from Kernel Mode Linux, Rule Set Based Access Control, Novell AppArmor, Openswan, grsecurity, Linux VServer, Ndiswrapper, web100, Nefilters, Suspend2, Speakup, Amiga Smart File System, Cdemu, SquashFS, fbsplash, QuadDSP, and more. It also contains many drivers and fixes.
Enhancements:
- This version was updated to patch against Linux 2.6.20.
- User Mode Linux with Linux-PHC, LinuxIMQ, Web100, WANPIPE, WRR, ReiserFS4, SquashFS, UnionFS, Bootsplash, and Kernel Color Output were added.

Linux Kernel Monitor is a tool for monitoring and managing linuxs kernel. It has been developed for GNOME, using Glib and Gtk libraries in C language.
lkmonitor tries to offer detailed information of the characteristics of the system, as type of cpu, state of the memory or the file system registered in kernel.
lkmonitor is an open source project with information about the source code and software architecture to make easy the development of new characteristics.
Enhancements:
- IO information, kernel information, networking info, processes specific information, filesystems, modules, etc.

OpenVZ is a modified Linux kernel with additional support for OpenVZ Virtual Private servers (VPS).
VPSs are isolated, secure environments on a single physical server, enabling better server utilization and ensuring that applications do not conflict.
Each VPS performs and executes exactly like a stand-alone server; VPSs can be rebooted independently and have root access, users, IP addresses, memory, processes, files, applications, system libraries, and configuration files. OpenVZ is a subset of Virtuozzo.
Whats New in 2.6.18-028stab039.1 Stable Release:
- A critical fix in CPT. Minor fixes for bridge, XEN x8664, CPT, 4GB split, NFS, VPIDs, etc.
- Fixes for swsusp on SLES, CBQ fairness on low rates, and an NFS startup deadlock.
Whats New in 2.6.18-028test027.1 Development Release:
- Fixes/improvements in checkpointing, NFS in VE, IOPRIO, and the CPU fair scheduler.
- A few fixes have been ported from the mainstream branch.
- The NMI watchdog is now disabled by default.
- DRBD has been updated to 8.0.