change ssh port to make it secure

we can remote another computer on same network using ssh, but if there is someone else who knows the password on the computer so he can also do remote acces to the computer. so we have to change some settings by replacing the existing ports so other people will not easy to access the destination computer

1. open file sshd_config
   sudo nano /etc/ssh/sshd_config
2. find text
   Port 22
   change with
   Port 2222 / another port number
3. find text
   PermitRootLogin yes
   Chenge with:
   PermitRootLogin no
   this setting will not permit root as default login
   5. save by
   ctrl+x press y then enter
   6. restart ssh lo
   sudo /etc/init.d/ssh restart
   

facebook server down in some country

Washington - The Facebook fans in some countries had confused because their favorite sites were not accessible. Apparently, it had no problem on the server for Facebook.

Quoted from Press Association, Sunday (21.2.2010), the members of Facebook in the United Kingdom, United States, Mexico, Thailand and several countries began to complain difficult to access Facebook since Saturday local time.

In which, among other complaints submitted via Twitter mikroblogging site, some users reported that they had difficulty logging in. Some longer felt that access to the site is very slow.

Through his spokesman, Matt Hicks, the Facebook admitted that there was little damage on the server. But he said, the percentage of users who have very little disruption. Unfortunately no mention user in any country affected by the problem.

Lucky, Facebook technicians can quickly overcome the problems occur so that the current access to the site is no longer difficult. Not explain what was causing the problem on the server brand

$500 For Hacker From Google

Here comes the Google’s turn to offer bounty for hackers finding bugs in Chrome. As per the latest post “Encouraging More Chromium Security Research” on its official blog of Chrome,  Google has decided to follow the practice of Microsoft and other organizations to reward the security researchers.

For every Security vulnerability found in Chrome,  Google will be offering cash reward of $500 and  if that bug turns out to be critical then it can go upto $1337 (magic number ).  Even more, Google is willing to offer permanent position for security researcher in its Mountain View office at CA.

This is wise step from Google to get the attention of security researchers and make them work for its products.

However I wonder when third party organizations such as iDefense, Tipping Point offering bigger bounties for hackers why some one will settle for mere $500 …!

Open Office Easter Egg: Play Space Invaders in Calc

Taken From

Finding an Easter egg in movies is usually a cool thing, but finding them in software is even cooler.  Today we will look at the hidden game in the Open Office Spreadsheet program Calc.

Open up a new Calc Spreadsheet and enter =GAME("StarWars") into any of the cells and hit enter.  Make sure and type in the capital letters as shown to get it to work.  The easiest would be to copy the text above and paste it into a cell.

This opens up the Star-Wars Galaxy game which is a Space Invaders clone.

The instructions are in German but you don't need to know a single word to be able to start playing.  Just use the arrow keys to move and the Spacebar to shoot.

This is not the greatest Space Invaders clone but still fun knowing you can take a break from data entry and get your retro gaming fix.

For more about Easter eggs in other software and web services check out our Wiki Page on Easter Eggs.

How To Hide Kernel Updates in Ubuntu

 

Ubuntu’s Update Manager is a great utility that keeps all of your software up-to-date. If you’re using the default sources, updates have been tested and should work with no problems.

However, one item that you may not want to upgrade is the Linux kernel that powers your computer. Maybe you’ve customized your kernel, are annoyed with constantly cleaning up your Grub boot menu, or have had issues with video and audio drivers not working after kernel updates.

The following steps will show you how to hide kernel upgrades in Ubuntu while still allowing you to use Update Manager to get other software updates.

APT (Advanced Packaging Tool) is the system that Ubuntu uses to manage all of the software installed on a system. It allows you to “pin” a package to a certain version, so that it won’t be updated when you the Update Manager runs.

To pin your kernel packages, first you must determine what version your kernel is. One way to do this is to open the Synaptic Package Manager in System > Administration.

Type in “linux-generic” in the Quick search text field and hit enter.

Make a note of the number listed in the “Installed Version” column. We’ll use it in the next step.

Next, we need to edit the file /etc/apt/preferences. Open it by pressing Alt+F2 to bring up the Run Application window and entering in:

gksudo gedit /etc/apt/preferences

This will open up a gedit window. Most likely the window will be blank, unless you’ve played around with APT before.

In the window, type in the following, replacing the version number with the version number you found in the Synaptic Package Manager.

Package: linux-generic linux-headers-generic linux-image-generic linux-restricted-modules-generic
Pin: version <insert version here>
Pin-Priority: 1001

Save the file and close gedit. If you open the Update Manager, you should see that the Linux kernel updates are now hidden!

And that’s it!

Remove Old Drivers After Upgrading to New Hardware

Remove Old Drivers After Upgrading to New Hardware

If you are experiencing weird issues after upgrading your hardware, or you’ve just upgraded to the latest hardware device and aren’t seeing the performance you’d like, you might want to remove the old drivers which are still installed for the old hardware, even though you can’t normally see them in device manager.

What you have to do is set a less-known flag to allow you to see non-present devices, and then launch device manager. You’ll then see the old devices in the list, and can uninstall the drivers for them.

In Windows Vista, the first thing you’ll need to do is open a command prompt in administrator mode. Type cmd into the start menu search box, and then use Ctrl+Shift+Enter to open in administrator mode. (You can also right-click on the command prompt and choose Run as Administrator)

Now paste in the following line:

SET DEVMGR_SHOW_NONPRESENT_DEVICES=1

Then type in devmgmt.msc to start up Device Manager from the administrator command prompt:

Once you are in Device Manager, go to the View menu and choose Show Hidden Devices, which will show all the device drivers including things that aren’t currently installed in your computer.

Notice how I have 6 mice in the list, even though I only have two installed (and my drawing tablet). The other 3 mice are old mice that I’ve used until they died…. the Geek tends to wear through input devices very quickly since he never leaves the computer…

You can right-click on the driver and then choose Uninstall from the menu to remove the drivers for that old hardware.

I’ve found that this can resolve a lot of weird issues, and even increase performance on some machines where you’ve upgraded a ton of times. This isn’t necessarily going to increase performance, but it’s nice to have a tidy computer nonetheless.

This tip also works the same in Windows XP.