nixCraft » Linux Embedded devices

Linux: 20 Iptables Examples For New SysAdmins

Vivek Gite — Tue, 13 Dec 2011 08:29:41 +0000

Linux comes with a host based firewall called Netfilter. According to the official project site:

netfilter is a set of hooks inside the Linux kernel that allows kernel modules to register callback functions with the network stack. A registered callback function is then called back for every packet that traverses the respective hook within the network stack.

This Linux based firewall is controlled by the program called iptables to handles filtering for IPv4, and ip6tables handles filtering for IPv6. I strongly recommend that you first read our quick tutorial that explains how to configure a host-based firewall called Netfilter (iptables) under CentOS / RHEL / Fedora / Redhat Enterprise Linux. This post list most common iptables solutions required by a new Linux user to secure his or her Linux operating system from intruders.

Linux Server with Embedded Display

Vivek Gite — Sun, 23 Nov 2008 11:58:27 +0000

Looks nice but this hack is not for the faint hearted!

Old Gateway PC transformed into a Linux server with embedded display, which is a hacked portable B&W TV driven directly by the VGA card.

How To: Build an Embedded Linux Distribution From Scratch

Vivek Gite — Sat, 16 Aug 2008 22:29:36 +0000

Embedded Linux is the use of a Linux operating system in an embedded computer systems such as a mobile phones, personal digital assistants, media players etc. This tutorial shows you how to install Linux on a target system. Not a prebuilt Linux distribution, but your own, built from scratch.

How To Install Fedora Linux On PlayStation 3 ( PS 3 )

Vivek Gite — Mon, 04 Aug 2008 09:18:42 +0000

Great information on how to install Fedora Linux on PS3. In this article, first in a series, Peter Seebach introduces the features and benefits of PS3 Linux, and explains some of the issues that might benefit from a bit of tweaking.

5 Reasons To Avoid Apple iPhone 3G

Vivek Gite — Wed, 16 Jul 2008 20:49:36 +0000

Your iPhone 3G comes with a complicated list of rules about what you can and can't do with it. Free software foundation has published the list of 5 reasons to avoid Apple iPhone 3G.

NETGEAR Launches Open Source WGR614L Wireless-G Router

Vivek Gite — Fri, 27 Jun 2008 22:23:09 +0000

NETGEAR Launches Open Source Wireless-G Router Enabling Linux Developers and Enthusiasts to Create Firmware for Specialized Applications.

New Linux Platform For Car Electronics From Intel And Wind River Systems

Vivek Gite — Wed, 21 May 2008 11:38:07 +0000

Intel and Wind River Systems have teamed up to create a Linux/x86 platform for car electronics.

Understanding Real Time Linux Architecture ( RTOS )

Vivek Gite — Fri, 18 Apr 2008 08:11:23 +0000

A real-time system is one in which the correctness of the computations not only depends upon the logical correctness of the computation but also upon the time at which the result is produced. If the timing constraints of the system are not met, system failure is said to have occurred.

Linux / UNIX minicom Serial Communication Program

Vivek Gite — Tue, 05 Feb 2008 08:32:21 +0000

Linux comes with many serial text and gui based serial communication programs. My favorite is minicom - friendly menu driven serial communication program. If you are addicted to DOS / Windows TELIX (a telecommunications program originally written for DOS and was released in 1986), minicom is for you under Linux / UNIX. minicom Common features [...]

Tutorial: Ubuntu Linux on a Handheld / Mobile Device

Vivek Gite — Thu, 31 Jan 2008 07:32:48 +0000

Ubuntu Linux is a great server and desktop distribution for x86 computers, but did you know that it's also ideal for handheld and mobile embedded devices? Ubuntu's latest release, Gutsy Gibbon, now includes support for the embedded and mobile spaces with the Ubuntu Mobile and Embedded (UME) project. Get to know the UME project, and [...]

Asus E-DT / E-Monitor / E-TV – Linux Based Low Cost Devices

Vivek Gite — Wed, 30 Jan 2008 22:18:04 +0000

Asus is extending the idea of Low-cost Linux based computer and gadgets to desktop PCs, TVs, and Monitors. Asus has named the upcoming additions to its Eee PC family of low-cost computers, soon to be augmented with a small form-factor desktop machine, an all-in-one system and a TV. The details are as follows: a) E-DT [...]

Nokia to Acquire Trolltech For USD 150 Million

Vivek Gite — Mon, 28 Jan 2008 15:17:29 +0000

Recently, Sun acquired MySQL for USD 1 billion. Today Trolltech announced that they have entered into an agreement that Nokia to acquire Trolltech for USD 150 million. Congratulations, Eirik, Haavard and the crew. Trolltech created Qt, a multi-platform C++ Graphical User Interfaces (GUI) framework which also includes packages such as data structures and a networking [...]

Digital Electronic Stethoscope Powered by uClinux ( Embedded Linux ) Distribution

Vivek Gite — Wed, 26 Dec 2007 10:39:59 +0000

A team of electrical and computer engineering students at Calvin College is designing a digital electronic stethoscope running uClinux (pronounced "you-see-linux") as its operating system. The team has chosen the Coldfire MCF5275 Microprocessor from Freescale. This is a 32-bit microprocessor with built-in USB Device, Ethernet, harware encryption, and eMAC. The eMAC (Enhanced Multiply Accumulate Unit) [...]

How to use a Bluetooth phone with Linux

Vivek Gite — Tue, 11 Dec 2007 14:58:35 +0000

This short guide explains how to use Bluetooth to pair a mobile phone with a Linux desktop computer and use Bitpim to access phone data: My desktop computer doesn't have built-in Bluetooth support, so I used a cheap USB Bluetooth adapter. I started by installing GNOME's Bluetooth tools. On Ubuntu, that is the gnome-bluetooth package. [...]

Display real-time system information from your Linux box on a LCD with LCDproc software

Vivek Gite — Thu, 04 Oct 2007 07:09:22 +0000

I’m currently working on a small project. I came across cool software called LCDproc. If you have HD44780-based display you can build really cool system for just US $15. LCDproc is a piece of software that displays real-time system information from your Linux/*BSD box on a LCD. The server supports several serial devices: Matrix Orbital, [...]

Motorola RAZR 2 V8 Linux phone review

Vivek Gite — Mon, 20 Aug 2007 17:18:15 +0000

I did used Motorola RAZR V3 for sometime in 2006 before I dropped it into a swimming pool :( The new RAZR 2 has a bigger screen, better UI, quad-band GSM 850/900/1800/1900 with EDGE and Linux platform. OSnews has published a review for the new RAZR 2 V8: The RAZR2 V8 is a quad-band GSM [...]

ASUS Eee PC: $199 Cheap Linux Laptop

Vivek Gite — Tue, 31 Jul 2007 00:47:46 +0000

Cheap Linux Laptop From Asus is ultimate ultra portable computer for just $199.

Nokia E90 Review (Good for sys admins)

Vivek Gite — Thu, 26 Jul 2007 03:11:09 +0000

I’m still stuck with Blackberry and Nokia 6130, good folks at Osnews has posted a nice review of Nokia E90 business phone: The E90 is a Communicator-class device and very popular among businessmen, but also among system administrators too (one of our friends, sysadmin at Google, is using Nokia's qwerty/wifi devices specifically for SSH access). [...]

Linux USB Pen / Stick RAID

Vivek Gite — Sat, 14 Jul 2007 21:56:03 +0000

Tux does all sort of things including setting up a RAID on USB sticks :) From the article: This is an example of productive and practical use of a RAID. Granted, this project does not have the archaic grandeur of a Floppy Disk RAID, but then again, the capacity and performance of this system are [...]

Download of the day: Fedora 7 CD / DVD ISO

Vivek Gite — Fri, 01 Jun 2007 01:53:42 +0000

Update: Nov-25,2008: Fedora Linux 10 has been related and available for download. Update: Nov-7,2007: Fedora Linux 8 has been related and available for download here. Fedora 7 has been released. The Fedora Project is a Red Hat sponsored and community supported open source project. Its goal is the rapid progress of free and open source [...]