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Linux client/server configuration can have several points of failure. |
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BIOS configuration settings are set at the factory. The Linux installation can be started from a Linux boot diskette.
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The Linux kernel port to x86-64 is based on the existing IA32 port with some extensions, including a new syscall mechanism, 64-bit support and use of interrupt stacks.
Without address pre xing, the code usually defaults to 32-bit accesses to registers and memory, except for the stack which is always 64-bit aligned and jumps.
In the 64-bit kernel, accessing the task structure through the stack pointer doesn't work as interrupts running on the special interrupt stack also need to access it, for example, to maintain the per-process system and user time statistics On x86-64 the current process counter is stored into the PDA which is eciently accessed using the register.
Linux_Journal_FAQ Specialized Systems Consultants, Inc. (SSC) is an established leader in the Linux, Open Source and UNIX fields.
The most well-known publication of SSC, the award-winning monthly magazine Linux Journal, is now celebrating its eighth year of publication.
Topics covered include a history of LJ, general information, editorial content, advertising in LJ, subscriptions and distributors/retailers.
Linux Journal helps readers find hardware, software and services, and features articles for both newbies and professional users.
Linux Journal's editorial staff includes well-known names such as Doc Searls, senior editor and co-author of the best-selling Cluetrain Manifesto, and Don Marti, editor in chief and vice president of the Silicon Valley Users Group.
WireX_HP
PORTLAND, OR, Aug. 19, 2002---WireX, Inc., a developer of Immunix(TM) security for Linux, today announced a family of Secure Linux Solutions(TM) based on Immunix-secured Linux and integrated with market leading security applications to be made available on HP ProLiant Servers.
"As Linux servers have proliferated throughout corporate networks and data centers, attacks on the operating system are increasing, and hackers are also continuing to exploit the known vulnerabilities in security applications," said Jim Miller, president and CEO of WireX.
Trend Micro, developer of InterScan VirusWall, the global leader in antivirus software at the Internet gateway, is the first software partner to join in the integration effort with WireX.
"The Secure Linux Solutions Server concept is unique in its integration of hardware, operating system and application software," Miller emphasized.
linux_gettingstarted
Linux is a Unix-like operating system that has developed a reputation for stability and adaptability as both a network server and an end-user workstation.
The systems are running Red Hat Linux 7.1 and have a variety of application software installed on them, including word processing, spreadsheet, and web browser applications.
Because most computer users are more comfortable with GUIs, the Linux systems have been configured to automatically start in a GUI environment known as Gnome.
Clicking this icon displays a menu of available applications and utilities.
To launch an application, click the Main Menu, select Programs, and then select the submenu and program that you want to launch.
Linux_system_admins_guide-0.6.1 The Linux System Administrators' Guide: Version 0.6.1 by Lars Wirzenius An introduction to system administration of a Linux system for novices.
One particular point where I have cut corners is that I have not covered very thoroughly many things that are already well documented in other freely available manuals.
Another example is the virtual filesystem (VFS) layer that abstracts the filesystem operations away from their implementation.
Overview of a Linux System login terminated because the username and password didn't match, init notices this and starts a new instance of getty.
The Unix filesystem structure groups files according to purpose, i.e., all commands are in one place, all data files in another, documentation in a third, and so on.
dsm_lj
Efficient cluster security is now an essential requirement that has not yet been addressed in a coherent fashion.
One important component of DSI is the Distributed Security Module (DSM) that provides an implementation of mandatory access control within a Linux cluster.
The LSM framework does not provide any additional security in the Linux kernel; rather it provides the infrastructure to support the development of security modules.
Since not all the components of DSI are currently implemented, we have created some test programs to emulate some parts of DSI such as loading the security policy and alarm receivers.
In this case, it is not important whether the server has DSM installed or not.
rh-rtpaper http://www.linuxdevices.com/files/article027/rh-rtpaper.pdf
The gist of the discussion was over what was the best solution to the Linux scheduler latency problem, that is the delay between the occurrence of an interrupt and the running of the process that services the interrupt.
Since one of my jobs at Red Hat is to evaluate and recommend new techniques for embedded Linux solutions and since scheduler latency is one of the biggest complaints that hard realtime champions have about Linux, I decided to evaluate both patches and see which one came out on top.
The third component, scheduler latency is the amount of time that elapses between the interrupt service routine completing and the scheduling function being run.
Linux for iSeries Solutions Guide
The information in this document is subject to change without notice.
IBM assumes no responsibility for any errors that may appear in this document.
The material included in this presentation regarding third parties is based on information obtained from such parties.
No effort has been made to independently verify the accuracy of the information.
This presentation does not constitute an expressed or implied recommendation or endorsement by IBM of any third party product or service.
Any trademarks or registered trademarks that appear belong to their respective owners.
Other company, product and service names may be trademarks or service marks of others References in this publication to IBM products or services do not imply that IBM intends to make them available in all countries which IBM operates.
Linux enables a new stream of e-business applications for iSeries.
linux_hwd_vp http://www.codehost.com/downloads/white_papers/linux_hwd_vp.pdf
Is your Windows-based business going so well that you can afford to ignore the rapid growth of the Linux operating system?
Sure, you may have a solid Windows driver/install/configuration tool bundled with your product distribution, but is your hardware as user-friendly as it should be for the expanding Linux community?
Last year was a banner year for Linux.
Its acceptance is gaining tremendous momentum, especially in the server market and the Internet infrastructure.
In fact, many have come to see this up-and-coming operating system as the first real rival Microsoft has seen to its business since it released Windows 95.
The Linux desktop market share has grown from 1 percent in 1998 to 4 percent (some 6 million desktops) in 1999, according to IDC.
whitepaper http://sources.redhat.com/elix/whitepaper.pdf
This need has led Cygnus Solutions to specify EL/IX, an Embedded Linux API based on POSIX, which is suitable for other embedded operating systems as well.
The goal of EL/IX is, first and foremost, to standardize the APIs available in desktop Linux today in such a way that embedded system developers have a clear and consistent idea of what functionality they can expect for a given embedded target: 1.
We are starting small because we believe that the right approach to the problem is to make enable the API to support configurable implementations, and thus configurability must be considered at the lowest level of the design.
EL/IX will first be implemented as a configurable compatibility layer on eCos, an open source RTOS, much in the same way as Cygnus already provides an optional ITRON compatibility layer for eCos.
Linux_from_scratch http://www.linux-magazine.com/issue/04/Linux_from_scratch.pdf
Most experienced Linux users have gone through at least one "Distribution war" and many have actively taken part in them.
For this very reason, in March 1999 a Linux expert called Gerard Beekmans started a project called "Linux From Scratch" (LFS) see http://www.linuxfromscratch.org/ for more details.
The aim of the LFS book is the step by step installaton of a complete development system including compiler and all other necessary programs.
A ready-made distribution serves as the basis for an LFS installation, since creating a compiler without compilers would be a little hard to do.
You can usually get help very quickly via one of the mailing lists (see box) or in the LFS IRC (see the web site for details).
Secure-Programs-HOWTO
A copy of the license is included in the section entitled "GNU Free Documentation License".
More general sets of software engineering processes are defined in documents such as the Software Engineering Institute's Capability Maturity Model for Software (SW-CMM) [Paulk 1993a, 1993b] and ISO 12207 [ISO 12207].
Chapter 3 describes the general Unix and Linux security model, giving an overview of the security attributes and operations of processes, filesystem objects, and so on.
Many programmers don't intend to write insecure code - but do anyway.
Elias Levy (Aleph1) discusses some of the problems in making open source software secure in his article "Is Open Source Really More Secure than Closed?".
DS-LinuxSDK
The Ixia Linux SDK contains the tools and documentation required to build custom C/C++ distributed applications to run on Ixia's processorbased Load Modules.
The resulting applications can be built into the default load image for all Load Modules on a chassis, or can be downloaded to individual Load Modules via ftp.
A typical configuration for developing Linux applications on Ixia Load Modules includes the user's Linux PC, the Ixia Chassis running Windows and standard Ixia software (IxServer and IxExplorer), processor-based Load Modules inside the Chassis, and a user-supplied networking device connected to the test ports of the Load Modules.
User applications running on the port CPUs can use stardard Linux system services and commands, and may communicate with the user's PC via TCP/IP over the management network, or with the device under test via the test network port.
LLC203 The course is with live demonstrations of Linux High Availability Server, Fail Over Server, Linux Virtual Server, building Linux Firewalls, enabling Diskless Server / Nodes, modifying and recompiling the Kernel, managing LDAP Services, understanding the concepts of RAID & Linux Routers.
This course is for Linux Administrators who wish to learn advanced skills on Linux System & Networking features.
Candidates who complete this course will be able to setup Linux High Availability Cluster; enable diskless servers/clients; setup software RAID, Linux Firewalls and Routers.
The course fee may be paid in cash or cheque / Demand Draft payable in Bangalore City in favour of "Linux Learning Centre (P) Ltd.".
Linux is the registered trademark of Linus Torvalds.
dwarfs-debian-guide_2.2.98 Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.1 or any later version published by the Free Software Foundation; with the Invariant Sections being Chapter 1 Introduction, with no Front-Cover Texts, and with the Back-Cover Texts being "The early development of the material in this work was produced with the financial support of Planet Linux.
VMware's support of this free software e ort has included the donation of license to use it's MultipleWorlds nology without fee.
Now, most other distributions also supply source code and these same programs, but they will also put packages into their distributions that can not be redistributed under certain conditions, without any concern for the legal problems that they deliver to their customer.
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