The leading textbook in Artificial Intelligence. Used in over 1000 universities in 91 countries (over 90% market share) and the 85th most cited publication on Citeseer.
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I May Learn Linux Before I Die !
A branch of computer science that studies how to endow computers with capabilities of human intelligence. For example, speech recognition is a problem being worked on by AI scientists.
Emergency Recovery: Causes of System Failures
Several situations might render a system unbootable. The most common class of errors relates to a failure to load and boot the kernel. This might happen if you compiled a kernel without support for your boot device (such as forgetting the IDE driver) or forgot support for the root file system type (usually ext2). Errors can also lurk within the kernel compilation step itself Compiling a kernel with an experimental compiler might cause the boot to fail. Circumstances beyond the control of SuSE can also damage Linux. The installation of another operating system may overwrite LILO—the kernel itself may be fine, but nothing remains to load it.
The second major group of system failures consists of various file system corruptions and outright mistakes. It is conceivable that an untimely power failure could corrupt files vital to booting even a rudimentary system. Perhaps more likely is that such files get altered or deleted by an overuse of the root account. There are many ways that a Linux system could become damaged, but in the end if the system becomes unbootable, you need to somehow recover from the emergency.
Although having a system fail to boot can be one of the most distressing types of failures, it’s not the only one you might have to guard against. Files and entire directories may get damaged or deleted over time. Mistakes and misfortunes do happen, so you need to know how to handle them. The following sections describe some of the options you have after the system fails to boot, files or file systems get corrupted, or you forget the root password.
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“MFT is Corrupt and Unreadable” Error in Windows XP May Cause File Loss When you start your Microsoft Windows XP based computer, the boot process may get terminated with MFT (Master File Table) errors. At this point, MBR (Master Boot Record) Boot Loader canât read boot information stored on the hard drive and thus the system does not boot up. In such case,...... -
LINK : fatal error LNK1181: cannot open input file 'C:\Program.obj' I'm working on a HUGE article titled something like "More VC++ Compiler & Linking Errors, with Real English Explanations" and it's getting totally out of hand. Really long. And I need to go back through most of the article and make one more check (triple check) to make sure all...... -
How to Fix Your Mac /caption]Mac machines are generally stable, but there are always times when any computer is seemingly a little under the weather. If youâre normally a Windows user though, you probably have no idea how to diagnose or begin to fix any problem that Macs may experience. So what can you do...... -
PDA and VPN Treo Troubleshooting Guide Here are some troubleshooting guides for particular topics. Speed Up Your PC Easily Scan, Repair and Fix Errors Speed & Optimize PC, Free Download (1) Your Virtual Network Connection (2) VPN Troubleshooting Error Messages (3) VPN Modems Troubleshooting Guide (4) VPN ISP Troubleshooting Guide. (1) Your Virtual Private Network Connection...... -
10 Most Common Mistakes of DIY'ers Every year, thousand of homeowners pick up their tools and go to work on their homes. Unfortunately, many are not prepared for the projects they are facing and they may end up causing more damage. Here are the top ten mistakes that DIY'ers make when fixing or renovating their home.......
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Linux 101: Word Alert
This section will refresh you from some terminologies that we always encounter in the web or with Linux.
IP Address - IP stands for Internet Protocol. An IP address consists of a series of four numbers separated by periods, that identifies n single, unique Internet computer host. Example: 192.34.45.8. This works the same way as phone numbers are used. Computers use IP address to trace and locate you like your physical address or phone number.
Static IP is the permanent internet address that your service provider provided you. If your Service Provider has assigned a fixed IP address; enter the assigned IP address, subnet mask and the gateway address provided by your service provider.
Dynamic IP is ussually assigned to LANs and broadband networks. When a user disconnects or shutdown his computer, the dynamic IP goes back into the pool of IP addresses to be assigned to other users. Therefore, in this case if a user connects to the internet once again, the IP will not be the same IP as before you have been disconnected.
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Benefits of Using a VOIP Phone System in Your Business A telephone service alternative that has been growing in popularity over recent years is Voice Over Internet Protocol service, more commonly known as VOIP. A number of popular brands of VOIP service are already on the market, providing telephone service to individuals and businesses alike for flat monthly fees regardless...... -
Dana Point Marina Phone: 949.496.6137 Marine Stand By Channel? Yes, the marina can be reached on channels 16 and 68 Average Water Depth? The depth is usually around 6 feet, but this can change. Please call ahead for the most recent report. Is there a pumpout station? Yes, but only official tenants...... -
15 Point Checklist for Choosing a VOIP Service Provider One of the new telecommunication buzz words these days is VOIP, or Voice over IP. This new technology allow you to place telephone calls using your high speed internet connection anywhere around the world using software or hardware provided by various VOIP service providers.With so may VoIP service providers to...... -
Virtual PBX vs Self-Hosted PBX Systems PBX Systems allow you to set up extensions, customer management systems, auto-attendants, call redirects and more to route calls within your organization. These operations are handled through a private branch exchange server (PBX). Virtual PBX services will setup, maintain, and host your exchange server off-site and you simply buy...... -
Smart Choices in VoIP For New Users The buzz surrounding Voice over IP technology has been growing for quite some time, but only recently has the notion of ditching standard telephone service grown so compelling that companies like Skype can claim over 215 million downloads of its product. In this article, we'll explore the current offerings......
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How to delete User from the Command line
Deleting a user might occasionally become necessary. You should clean up any unused accounts when someone stops using your computer—or when you decide to stop letting someone use it! You can delete a user either from the command line or by using YaST, as described in the following sections.
The userdel command allows you to delete users. It undoes most, but not all, of what the useradd command does.See the steps below for instructions.
1. Before you remove a user, take note of the user’s ID number since you may need to know this later. Look at the third field of the user’s entry in /etc/passwd. For example, you can see in this line from the password file that user joe has user ID 100:
joe:x:100:100: :/home/joe:/bin/bash
2. As root, run the userdel command with the username of the user you wish to remove. (Keep in mind that you cannot remove an account if the user is logged in.)
3. By default, userdel will not remove any of the user’s files. To remove the user’s home directory automatically, use the -r option. For example:
# userdel -r joe
If you do not use the -r option, you will need to remove the user’s home directory manually:
# rm -rf /home/joe/
The user may have other files on the system which userdel has not removed. Particularly, look in the /var/spool directory. You might want to remove old mail, for example. Also, the user may have installed a crontab file. Here is how you would remove these things:
# rm fvarfspooi/mail/joe
#rm Ivarlspooilcronltabs/joe
4. It is possible that the user still has some jobs running. Rather than rebooting, you can search for and kill any jobs left running by the user. The user no longer exists in the password file so you cannot search by the user’s name. Instead, search for jobs owned by the user ID you found in Step 1. Here is an example of killing a job that Joe left running:
# ps —user 100
PID TTY TIME CMD
1490 ? 00:06:21 mydaemon
# kill —9 1490
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Tuning-Up Windows XP Computer The purpose of this procedure is to get your computer running again in peak performance just like the day you purchased it. Many of the steps listed below will free up wasted hard disk space, increase protection of personal information from outside intrusions, and clean and reorganize the system...... -
Becoming Self Employed - Here Are Five Genuine Reasons To Create A Home Based On-line Business In this point in time, several individuals are having a difficult time finding work as a result of the downturn of the economy. Each day, this crisis looks to be becoming worse and worse. In response to this, many individuals are seeking ways to earn cash online. What this really...... -
How To Find a Good Small Business Phone System? Do you find yourself running a small business with difficulty getting to every call? When running a small business people often feel that simply putting in a separate business line away from the home line will be good enough. Its just a matter of time, however, that youll realize...... -
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Home Network Security [/caption] Home Computer security 1. What is computer security? Computer security is the process of preventing and detecting unauthorized use of your computer. Prevention measures help you to stop unauthorized users (also known as "intruders") from accessing any part of your computer system. Detection helps you to determine whether or......
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Linux 101: Word Alert
This section will refresh you from some terminologies that we always encounter in the web or with Linux.
IRC is an acronym for “Internet Relay Chat” is a worldwide, online “party line” network that allows conversation to take place in real time. This creates an illusion that a particular group is like in the same virtual room. This is synonymous to internet messenger, ICQ, and online chat.
Kernel is the core of an operating system that contains the most primitive functions on which more sophisticated functions depend. The kernel serves as resource manager of different processes and also mediates multiple users in both kernel and user space.
URL stands for “Uniform Resource Locator”. This is basically one thing we are very familiar of. This an address that identifies a document or computer on the world wide web. We use this to get to the site that we want to see and explore.
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Save Time, Money and Space in Over 80 Ways If you're looking for handy gadgets, tools and various items that can save you time, money or space (or all three!) this list of more than 80 top products is just what you need. Everyone's got saving money on their minds these days. Some of us are always looking to...... -
Are They Watching You Online? When surfing the Internet you probably take your anonymity for granted, most of us do.Tapping phones, listening to confidential conversations, reading others' e-mail messages seems like something that only happens in spy movies to "other" people.However, you probably don't realize just how much information about yourself has the potential...... -
1st Time Meeting After Chatting Online Technology has always been there to make lives of people easier. In fact, thanks to technology the world of emotions has also been conquered. Don’t try to think dirty here folks. What I’m talking about is the love connection that can happen through online dating sites and chatting rooms or...... -
Rapid Growth in Telecom & VoIP Employment Opportunities U.S. Department of Labor forecasts show that the second fastest growing occupation through 2014 is that of Network Systems and Data Communication Analysts. Jobs in this category are expected to increase by 55% compared to the employment level in 2004.Ranked 5th in this time horizon were jobs for Computer...... -
Making The Most Of Internet Marketing For Businesses Several models correspond to business Internet marketing online, and they include e-commerce, lead-based websites, publishing and affiliate marketing. These business models have various sub-programs as it is the case with e-commerce where both business-to-client (B2C) and business-to-business (B2B) models are available. The sales leads from independent websites make the essence......
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Add and Delete User using YaST
- Start YaST as root.
- Select System administration, and then User administration.
- On the new screen that appears, type the new user’s name and press Enter. Defaults will appear in all the fields.
- Edit the defaults as you see fit, and then type and retype a password.
- When you are satisfied, press F4, and user is created
- Start YaST as root.
- Select System administration, and then User administration.
- On the new screen that appears, type the new user’s name and press Enter.
- Press F5 to delete the user. Answer yes when you are asked if you are sure. Be warned, however, that YaST will allow you to delete a user who is currently logged in.
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Video: How to Unlock and Root your Nexus One Everyone seems to appreciate it when we do guides and hacks so I thought it was time to film another. Today we will be hacking the new Nexus One. This is not a beginners guide. If you are a beginner, you should not be hacking your phone. These instructions assume...... -
Computer Security and its role INTRODUCTION The paper explores the role of Pass word, Anti virus and data encryption in computer security. It has been discussed that passwords is known to be ancient. Sentries would challenge those wishing to enter an area or approaching it to supply a password or watchword. Sentries would only allow...... -
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The risks of SHARING! As you've probably heard or read in the news, there was a recent leak of some extremely sensitive Congressional documents through a file sharing service. This leak highlights some of the inherent risks in the use of such services for moving data between users. In the past, email has been...... -
PC Safety 101 - How to Delete Spyware From Your System Spyware is one of the widely known online threats. However, if you're not a frequent user of computers and the Internet, this term might confuse you a little bit. Most people know there are many online threats on the Internet but only some people are really serious in protecting their......
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Linux 101: Word Alert
This section will refresh you from some terminologies that we always encounter in the web or with Linux. These are the words for this day.
The 10BaseT. Let’s understand this word by learning each term under it. First, 10— this is the frequency in MHz (or Mega Hertz), in short this cable has 10 MHz capability/speed. Secondly, base—is synonymous to Baseband. This is a type of communication used by Ethernet. Lastly, T— refers to Twisted Pair, it is the physical layer that is responsible for the signal.
Physical Layer Specification for Twisted-Pair Ethernet using Unshielded Twisted Pair wire at l0Mbps.This is the most popular type of LAN cable used today because it is very cheap and easy to install. It uses RJ-45 connectors and has a cable length span of up to 100 meters. There are two versions:
STP (Shielded Twisted Pair) which is more expensive
UTP (Unshielded Twisted Pair), the most popular cable.
These cables come in 5 different categories. However, only 3 are normally used in LAN5, Category 3,4 and 5. CAT 3 TP (Twisted Pair) cable has a network data transfer rate of up to 10Mbps. CAT 4 TP cable has a network data transfer rate of up to 16Mbps. CAT 5 TP cable has a network data transfer rate of up to 100Mbps.
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Successful Telephony - A Best Practice Guide Start with what you haveA spot check on your existing telecoms strategy and current infrastructure will focus you on what you have now, and lead you onto what you need to do next. Design a simple scale (for example poor, average, good and excellent) and use it mark the...... -
Small Business Telephone System with VoIP If you are changing your small business telephone system from a traditional dedicated fixed landline to the newer VoIP technology, there are some things you need to have in place to change successfully.1. Internet ConnectionTo route your calls over the Internet instead of over the existing telephone fixed landlines,...... -
Review of the Garmin Forerunner 310 XT Having a GPS enabled training device is a good thing. Having a training device offering GPS that isn't afraid to get a little wet is even better. The rugged Garmin Forerunner 310 XT is an indispensable training tool for any triathlete because it is a swim proof, GPS enabled trainer...... -
Smooth Move: Five Steps to a Successful Phone Transition During Your Office Move Moving your office to a new location is a considerable endeavor affecting nearly every aspect of your business operations. While there are many important projects to consider, ensuring that the primary means of communicationthe phone for most businessestransitions seamlessly should be one of the top priorities.Successfully moving the phone...... -
WiMax, VoIP, and the Metropolitan Area Network The emerging IEEE 802.16 standard, commonly known as WiMAX, promises to deliver last mile wireless broadband internet access capable of carrying data intensive applications, such as VoIP and streaming video, to Metropolitan Area Networks, as well as sub-urban and rural communities. WiMAX is considered a disruptive technology, designed as......
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How to specify the directory path
If the file you want to read is in a subdirectory of the directory that you are in, you can reach the file by typing a relative filename. Relative filenames specify the location of files relative to where you are.
Here are some additional rules that you need to know:
- One dot (.) always stands for your current directory.
- Two dots (..) specify the parent directory of the directory you are currently in.
- All directory paths that include (.) or (..) are relative directory paths.
You can see these files by using the -a option of the 1s (1) command. Without the -a option, the 1s (1) command does not bother to list the . or .. files, or any filename beginning with a period. This may seem strange, but the creators of Unix thought that having some files that were normally hidden kept the directory structure cleaner. Therefore, filenames that are always there (. and ..) and special-purpose files are hidden. The types of files that should be hidden are those that the user normally does not need to see in every listing of the directory structure (files used to tailor applications to the user’s preferences, for example).
Now specify a pathname relative to where you are. For example:
[fidia@veracruz lidial]$pwd
/home/lidia
[lidia@veracruz lidials]$ 1s – 1a . . / . . /etc/passwd
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Windows Mobile, iPhone, Android - Marketplace Comparison Detailed comparison between Windows Mobile Marketplace, Apple's iPhone AppStore and Android Market from developer point of view. By: Predrag Tomasevic (Click for bigger image) Introduction The article you are about to read is my compilation of thoughts on three currently most popular and talked about mobile platforms, sparked by whole...... -
Modifying the bashrc or bash startup files. Find the article here.Copy here:If you've been learning the command-line and you have the basics down (you should be, as the most effective way to use a computer is a combination of a GUI and command-line), the next step is to customize your environment. Beginner's Tip: "command-line" and "shell" are...... -
How to File Your Taxes for a Recent Graduate This post is part of a three post series which walks a recent graduate through filling out their W-4 and filing their taxes. After these three posts, recent grads should be squared away with Uncle Sam come April. Post 1: How To Fill Out A W-4 For A Recent Graduate...... -
Problem in sending big files on email? ...find solution here Technologies have surpassed the limitation of geographic boundaries; Online collaboration are common now a days, i.e. you are working on a project sitting at office while your team members are at different geographic location and working on different modules, towards end all data needs to be joined, hence you need to exchange large files,...... -
Fishing Report: July 24th, 2009 Prospects are good for all fish all around, but knowing where to find the right bite is the best way to get the most out of your fishing endeavor. Here is a look at what's biting, and more importantly, where. Lake Fishing: Bass: In the early and late hours you......
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