Computer – Page 2 – JithOnline

October 13, 2008

Easy Steps to set up NFS in your Computer or Server Network

Network File System [NFS] is a very effective way of sharing files and data across your Unix/Linux network. NFS offers a neat functionality that fits perfectly into the Unix/Linux filesystem. Simply mount a directory off another machine on your network and read from or write to it; even run applications from it, that’s completely transparent!

Following are the steps to achieve NFS facility in your network.

You need to set up two kinds of services of NFS that is NFS Server at file sharing server and NFS Clint at Clint or user side servers.
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Setting Up an NFS Server:

-Install NFS-Server application in servers which ever you want to share. Using following commands.

apt-get install nfs-kernel-server
or
yum install nfslock portmap nfs

-Place an entry in /etc/exports

/usr/local 192.168.0.1(ro) 192.168.0.2(ro)
/home 192.168.0.0/255.255.255.0(rw)

Here we are sharing ‘/usr/local’ with read-only and ‘/home’ with write permission. We can also specify network mask for allowing a group of network computers or each IP as shown above to allow specified IP to access this folders.

-If you come back and change your /etc/exports file, the changes you make may not take effect immediately. You should run the command ‘exportfs –ra’ to force
nfsd to re-read the /etc/exports file.

-You may need to set /etc/hosts.allow and /etc/hosts.deny
These two files specify which computers on the network can use services on your machine. Each line of the file contains a single entry listing a service and a set of machines. When the server gets a request from a machine, Its not compulsory if your are not using it.

-The NFS server is configured and we can start it running.

/etc/init.d/nfs-kernel-server stop
/etc/init.d/nfs-kernel-server start

Now we have setup NFS Server to share or get the shared NFS files. We need to set up following steps in Clint servers or PC

Setting up an NFS Client:

-Install NFS-Clint application in servers. Using following commands for this.

apt-get install nfs-common
or
yum install nfslock portmap nfs

-Mount the remote directory from your server just the way you mount a local hard drive, with the mount command.

mount 192.168.0.10:/home /mnt/home

Make sure you have created ‘/mnt/home’ directory before mounting it.

-To un-mount you need to run following command

umount /mnt/home

-NFS file systems can be added to your /etc/fstab file, same way as local file systems, so that nfs mounts when your system starts up. For this you need to enter following entry in fstab.

192.168.0.10:/home /mnt/home nfs rw 0 0

These are the simple steps to set up NFS mount; there are lots of options and steps and configurations to set NFS in little more effective manner, also can set fstab and export file configurations for more flexible NFS functionality.

September 7, 2008

Google with Cool Form Feature in Docs

Google Docs is actually an online word processor that’s completely free to use and comes with a couple of very nifty ideas. If you’ve not tried it yet then you’ve certainly got nothing to lose by doing so: the only requirement is that you sign up for a Google account.

Google Docs offers a solid array of features. The standard stuff is all here: auto-saving, spell checking and word count, the latter of which offers a readability assessment for your document, so you can see how clearly you write.

Where Google Docs really shines is with its sharing facilities. When working with a document, you can click the share tab and specify other people as collaborators or viewers. Viewers can merely look at the document, but a collaborator can edit it fully, so if you’re working with a co-writer on a project (or several) you can all utilize the same master document.

httpv://in.youtube.com/watch?v=eRqUE6IHTEA

There are lots of tools in Docs like spread sheet, Power Point and also Form facility that’s also absolute free.

Following are the steps to create a form and publish it on your site for getting reweave on your site or any thing you want. You can also see the summary of the poll or reweave of your form any time by logging in to docs.

Go to New > Form
Fill the Form as you want to display.

Submit that by clicking on Done button
Save the Form

Go to the More Action at top corner
There you can get the embedding code for your web site also you can edit the massage appears after the submission of poll or reweave by going to edit configuration.

You can view the published form by clicking on the hipper link which is show at the bottom of the page. You can share the URL to any one to participate in poll or reweave. Here is my Form.

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Creating a form from a spreadsheet:

Click on the Form tab and click on Create a form.

In the form template that opens, you can add any questions and options you’d like.

Click Email this from once you’ve finished adding your questions.

Add email addresses for your desired recipients.

Click Send.

August 27, 2008

Worldwidetelescope.org Microsoft WorldWide Telescope a copy of google sky

Microsofts WorldWide Telescope, a free tool that stitches together images from some of the best ground- and space-based telescopes. Microsoft says the “final frontier got a bit closer” as the software giant officially launches the public beta of its WorldWide Telescope, which is now available at http://www.worldwidetelescope.org.

Very similar to Google Sky, WorldWide Telescope is a web app that brings together imagery from ground- and space-based observatories across the world to allow people to explore the night sky through their computers.

Collections include pictures from the Hubble and Spitzer telescopes, as well as the Chandra X-Ray Observatory.

The web-based tool also allows users to pan and zoom around the planets, and trace their locations in the night sky.

The application itself is a blend of software and Web 2.0 services created with the Microsoft Visual Experience Engine, which claims to allow “seamless panning and zooming around the heavens with rich image environments”.
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WorldWide Telescope stitches together terabytes of high-resolution images of celestial bodies and displays them in a way that relates to their actual position in the sky.

WorldWide Telescope Software minimum system requirements

* Microsoft XP SP2 (minimum), Windows Vista
* 1 gigabyte (GB) of RAM; 2 GB RAM recommended
* 3D accelerated card with 128 megabytes (MB) RAM; discrete graphics card with dedicated 256-MB VRAM recommended for higher performance
* 1 GB of available hard disk space; 10 GB recommended for off-line features and higher performance browsing
* XGA (1024 x 768) or higher resolution monitor
* Microsoft Mouse or compatible pointing and scrolling device
* Microsoft DirectX version 9.0c and .NET Framework 2.0
* Required for some features; Internet connection at 56 Kbps or higher

worldwidetelescope.org Microsoft WorldWide Telescope a copy of google sky but still compare to Google sky worldwidetelescope is Mind blowing.

httpv://in.youtube.com/watch?v=CDNf5aLu_WU

August 24, 2008

How to Setup Free Mail Server for Your Own Domain with Google

Yes that’s true you can setup your mail server for your own domain, absolutely free with Google!! As we know Google having mind blowing mail servers; you will be getting IMAP, POP, Mail forwarding ….etc for free and we can trust Google and they are with us for a long time now. So here are the simple 8 steps you need to follow to setup your mail server with Google.

1) Go to Google Apps and sign up for a standard account for your domain.

2) Once you provide your info, Google will take you to your control panel/Dashboard.

3) Note that Google needs to verify that you own your domain. So click on the link to verify your domain ownership.

4) At this point there are two ways of verifying ownership, HTML and CNAME method you can use any one of this which ever convenient for you.

5) Now setting Google apps as your mail server, by using this people can send mail to ‘userid@yourdomain.com’ and it will get routed to Google apps. If you need this, then sign in to your domain hosting service and go to the DNS panel for your domain and add the following to the MX (Mail Exchanger) section. Make sure you delete the default MX entry that is already there by default. If you don’t have access to MX you need to contact your Hosting providers to set this.

Priority Mail Server

1             ASPMX.L.GOOGLE.COM.
5             ALT1.ASPMX.L.GOOGLE.COM.
5             ALT2.ASPMX.L.GOOGLE.COM.
10           ASPMX2.GOOGLEMAIL.COM.
10           ASPMX3.GOOGLEMAIL.COM.
10           ASPMX4.GOOGLEMAIL.COM.
10           ASPMX5.GOOGLEMAIL.COM.

If hosting provider allowing only one or three MX, then choose first 1 or 3. You can use priority as same.
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6) Wait a couple of hours to settle DNS (This depends up on hosting providers). There will be a default email address which ever you passed while signing up this will be master account. If you need one more email account then go to your Google apps dashboard and “User accounts>> Create a new user” and add new email account. Also activate your Email.

7) In the “Service settings >> Email” menu you can change web addresses for accessing Email. For this create a CNAME and modify URL. This URL can be used to login to mail box (ie: click on “Service settings >> Email” menu and change the default web address to http://email.yourdomain.com or whatever you used for CNAME)

To use the custom URL email.yourdomain.com, you must change the CNAME record with your domain host.

a) Sign in to your domain hosting service.

b) Navigate to your DNS Management page. Generally be found in Domain Management or Advanced Settings, if not you need to contact your Hosting providers to set this.

c) Find the CNAME settings and enter the following as the CNAME value or alias:

‘email’

d) Set the CNAME destination to the following address:

‘ghs.google.com’

8) Wait for a couple of hours to settle DNS (This depends up on Hosting providers). Then you can access to login page of your mail box using “http://email.yourdomain.com” or whatever CNAME you set.

August 24, 2008

How to Change the Theme of WinRAR with Colorful Free Themes.

WinRAR is a powerful compressing and decompressing tool or archive manager. It can backup your data and reduce size of email attachments, video files, doc files etc, also can decompress RAR, ZIP and other files which ever downloaded from Internet also create new archives in RAR and ZIP file formats. WinRAR latest version is in beta that’s Version WinRAR 3.80 beta 4. The stable version present in market now is WinRAR 3.71.

But Interesting thing in it!! Forgetting all its features and power, you can actually change WinRAR’s theme. If you didn’t see or heard that yet then now you should and if you do, you’ll be amazed!!! RARLAB is giving out more than 20 WinRAR themes for free on their website. It’s time to give you WinRAR software a little bit of refreshment.
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Themes are available in 32×32, 48X48, 64X64, 80X80, 96X90 tool bar icons sets sizes. All you need to do is

– Download any of the themes
– Open it with WinRAR application
– Restart your WinRAR
– Go to Option >> Themes choose your theme.

Now you can see change in rar files icons in your PC and a fresh look of WinRAR application too.

August 23, 2008

How To Remove Google Search Virus Warning Alert? This Site May Harm Your Computer

How To Remove Google Search Virus warning Alert? This Site may harm Your Computer

If your website is facing similar problem while searching then you need to make sure that..

1) Your ‘.htaccess’ file hacked.

Some one hacked your ‘.htaccess’ file and added malicious redirection codes in to it. What it dose means! It redirects the Google or any other search engine request to malicious domains, so for this you can do one thing like Remove all ‘.htaccess’ which are infected or replace it with original one.

2) Make sure your website is not affiliated with any Mallware related website or activates.

Your site may infected by iframe attack where hackers inserted JavaScript iframe codes into your first or last line of index pages of every folders. This calls an external malicious page in to visitor’s computer and loads nasty programs. The codes will be inserted in encoded format, so look like “%20%77%69%6e” in a file. You need to clean this.

Once you have reviewed your website and are sure it is clean, you can submit a request for re-review your site with google manully as follows.
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Using Google Webmaster Tools. (Note: you need to verify site ownership to see this information).

1. Sign in to Webmaster Tools with your Google account.
2. On the Dashboard, select the site you want.
3. On the Overview page, click Request a review and follow the instructions.

After this Google will review your website manually and, Once they will make sure that it doesn’t host or distribute any type of Malware, they will remove the identification from search results and it will re-index it.

Update:-

I forgot to tell the Reason and Precaution for this problem, here it is …

This can happen for various reasons like:

– poor/compromised account/FTP password, which allows hackers to guess the password [or use brutforce tools] and get unauthorized access.
– user’s computer infected by viruses, which is controlled by hackers. In this situation, customer’s uploads also get infected.
– poor scripts, which allows hackers to insert various malformed queries and remotely execute the code and perform intended action
– Virus effected theme selection for the application
– Installing application which are downloaded form third party sites; mainly not genuine sites.

You will have to ensure that:

– generate a strong password combination [for account, ftp, database etc]
– scan local computer with good antivirus, anti spy ware programs and clean bad programs.
– keep the software up-to-date with vendors/developers, and seek their support/forums for any known vulnerabilities/fixes/workarounds available.

August 23, 2008

Install OpenOffice 2.4 on Windows Vista

OpenOffice provides everything most people need in an office productivity suite for free. It is stable, reliable, and robust. Unlike its major competitor, it was designed from the start as a single piece of software, which makes for higher quality software and a more consistent user experience. OpenOffice is available on all major computing platforms and is supported in over seventy languages.

The main components of the OpenOffice.org Suite are

– Writer wordprocessor
– Calc spreadsheet
– Impress for presentations
– Draw for graphics
– Base database
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It has a familiar user interface, and is able to read and write the vast majority of legacy file formats (including common Microsoft Office formats). It is supported in over seventy languages, with active support both Communities based (free) and from commercial organizations (paid-for).

Installation:-

Download the OpenOffice 2.4 here…

Run the installer file; the installer extracts the files in an OpenOffice.org 2.x (en-US) Installation Files folder on your desktop, then the installer is launched automatically once the extract is complete. Then the real thing begins and it does install indeed in “\Program files\OpenOffice.org2.x” directory. Note that, it doesn’t create any desktop shortcut to launch the applications. They are in your Start menu once installed. And once it’s ok, just delete the folder on your desktop.

So now done with installation!! Enjoy the power of OpenOffice, Compare to Microsoft Office, Open office is bit faster and also it supports all Microsoft office related stuffs and especially for frees of cost, that’s interesting isn’t it?

August 18, 2008

IBM Builds Worlds Smallest 22nm SRAM Memory

IBM announced the first working static random access memory (SRAM) for the 22nm (nanometer) technology node. A nanometer is one one-billionth of a meter or about 80,000 times smaller than the width of a human hair. Worlds first and ever reported smallest working SRAM cell.

The SRAM cell utilizes a conventional six-transistor design and has an area of 0.1um2, breaking the previous SRAM scaling barriers. SRAM cell size is a key technology metric in the semiconductor industry, and this work demonstrates IBM and its partners’ continued leadership in cutting-edge process technology.
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22 nm is two generations away in chip manufacturing. The next generation is 32 nm, where IBM and its partners are in development with their leading 32 nm high-K metal gate technology.