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KVM error - Error starting domain: Network not found: no network with matching name 'default'

when i'm trying to net-start it, i'm getting the following error

# virsh net-start default error: 

Failed to start network default
so i've checked net-list
# virsh net-list --all
Name                 State      Autostart 
((Error starting domain: Network not found: no network with matching name 'default'))
and it is clear that network is not found. 

If it is missing, then the example XML config can be reloaded & activated

# virsh net-define /usr/share/libvirt/networks/default.xml
Network default defined from /usr/share/libvirt/networks/default.xml

# virsh net-autostart default
Network default marked as autostarted

# virsh net-start default
Network default started

# virsh net-list --all
Name                 State      Autostart 
default              active     yes


BlackBerry Booting error Solution!!!

I've had the "Reload Software: 552" error on 2 BlackBerry Curve 8900s.

It will pop up this error and doesn't allow to boot the system on

 When it occurred to me, this is what I did and got my mobile Back!!!

1. Reboot your BB:

alt-right Shift-del

2. Start a software reload from the Windows desktop, via the BB Desktop Manager.

When the reload started, I would get a screen on my BB showing 2 computers talking to each other. After a few seconds, this would crash into the 552 error.

3. 3-5 seconds into the software reload, CANCEL the desktop.

4. This should freeze the apps on both the desktop and the BB. The BB should still be showing the 2-computers.

If you do anything on the desktop at this point, the BB will crash into the 552 error again.

5. Terminate the desktop app processes via the Windows task manager. There are 4 RIM/BB processes to shut down.

6. At this point, the BB Desktop Manager app should be gone, and the BB should still show the 2-computers.

7. Now, start the BB desktop manager back up again, and initiate the software reload again ...

after updating new software your BB gotta be ready!!!!:)

The New iPhone Jail break tool


For all models of iPhone running OS 3.1.3. I have tried out the tool and it is the simplest jailbreak tool ever.
The one-click jailbreak process is quick and very straightforward.

To let you have an idea about jail breaking via Spirit, here is the jailbreak guide that walks you through the whole process.
But before that U wanna know the difference between JAIL BREAKING and UNLOCKING..,
I'll explain those things later in future blog! If u know abt jail breaking here u go
As usual, before you consider jail breaking your iPhone, remember to read the requirements carefully. If you have anything unclear, just leave ur comment!!

Front End Proxy on Ubuntu

f you're like me who shares the Internet connection with a six year old boy, you would want to install Parental Control tools to filter unwanted content.

There are several solutions that will work with Linux including browser-based filtering through Firefox extensions, DNS-based filtering using OpenDNS' free service, or a set of free applications configured to work specifically for web content filtering.

I prefer to install web content filtering tools on my computer because it provides the greatest control and flexibility. In Ubuntu, the following applications can be configured for content filtering:

* DansGuardian - content filtering engine.
* TinyProxy - light-weight HTTP proxy.
* FireHol - firewall application.

Individual installation and configuration of these tools can be quite challenging to an average user like me. Good thing there's a project called WebContentControl, a GUI for Parental Control. This tool pre-packages and pre-configures the applications listed above, and presents the options to the user in an intuitive interface.

Here is the step-by-step installation I performed:
(1) Make sure that the 'universe' repository is enabled. Go to System >> Administration >> Software Sources. In the 'Ubuntu Software' tab, make sure that the second tick box is checked.

(2) In the 'Third-Party Software' tab, click the Add button and add the following repositories:

deb intrepid main

deb-src intrepid main

(3) Install WebContentControl. Go to System >> Administration >> Synaptic Package Manager. Click the 'Search' button and look for WebContentControl. Select the package in the right window pane and go to menu Package >> Mark for Installation. Hit the 'Apply' button.

(4) You will notice that the package manager automatically selects and installs related applications. Once installed, you can run WebContentControl in Applications >> System Tools >> Web Content Control.

(5) Test your installation. You should get something similar to the following.

Busy box Error on Ubuntu

If ur a ubuntu User this error may be familiar to you..! most probably u'll do format whenever ur getting this i think.!!
Now Busy box error has the solution..!

1,Go 2the Kernal recovery mode by pressing the ESC key at the start up..!
2,On the command mode type the following command
3,sudo e2fsck -f -b 32768 -y /dev/sda1

4,here the sda1 or sdab1 depends on the disk..
5,this command will fix all the superblock errors
6,This ill modify the file system and revert the settings..!


Link Google, Gmail, Yahoo accounts with Facebook account

Add Linked account to Facebook account
1. Open & login into your account.
2. Goto Account > Account Settings.
3. Click ‘Change’ button next to linked accounts option.

4. Select the type of account that you want to link among: Google, Yahoo, MySpace, OpenID etc from drop down box.

5. Then click ‘Link to new account(s)’ button.
6. Then click ‘Allow’ button on the authorization screen.

After successful linking, all the linked accounts will be displayed on the ‘linked accounts’ option under ‘Account Settings’ screen. You can click on ‘remove’ button next to any linked account to remove respective linking with Facebook account.



Lock preferences in Firefox 3 on Ubuntu

If your running computer in a domain(server-client model) u'll surly hav a firewall for your clients, Normally we can break this fire wall from the client machine by disabling the firewall in the browser by the following steps
firefox--> Edit-->Preferences-->advanced-->network-->settings-->by clicking the auto detect
(( if the proxy is manual then it will respond the firewall setting so u cant browse blocked sites.
You have to disable the proxy switch option from manual to auto detect option bu locking the preferences buttoon by the following steps.

1.  Add the following to the end of  /etc/firefox-3.0/pref/firefox.js:
// tell firefox to load customized config file
pref("general.config.obscure_value", 0);
pref("general.config.filename", "firefox.cfg");

2.  Create a file called firefox.cfg in /etc/firefox-3.0/pref/ with the following content (the first line in both files must start with a comment):
// Lock specific preferences in Firefox so that users cannot edit them
lockPref("app.update.enabled", false);
lockPref("network.proxy.http", "");
lockPref("network.proxy.http_port", 8080);
lockPref("network.proxy.type", 1);
lockPref("network.proxy.no_proxies_on", "localhost,,");
lockPref("network.proxy.share_proxy_settings", true);
lockPref("browser.startup.homepage", "");

3. Create another file in /etc/firefox-3.0/pref/ called with the following contents (Thanks to Jeffrey LePage for this script):
# start of file
use strict;

# this gets the current firefox version
my $fire_ver = `/usr/bin/firefox -v`;

# this parses the version
$fire_ver =~ s/^\s*Mozilla\s+Firefox\s+([\d\.]+).*$/$1/;
#Mozilla Firefox 3.0.13, Copyright (c) 1998 - 2009

# this looks for firefox.cfg
if( -e "/usr/lib/firefox-$fire_ver/firefox.cfg" )
# firefox.cfg exists - this is good, no action is necessary
# make a symlink
symlink("/etc/firefox-3.0/pref/firefox.cfg", "/usr/lib/firefox-$fire_ver/firefox.cfg");
# end of  file

4. Open the root crontab editor by typing the following in a terminal window:
sudo crontab -e
Add the following to the end of the root crontab in the crontab editor:
# Copy firefox.cfg to the current Firefox binary directory
# to keep it working following an upgrade until this bug is fixed.
* * * * * /usr/bin/perl /etc/firefox-3.0/pref/ /dev/null 2>&1
This script will create a symlink to firefox.cfg every minute in the current Firefox binary directory (/usr/lib/firefox-3.0.x where x is the version number) to protect againt upgrades where the directory changes to x+1.  This is a very short script, so running it every minute will have almost no CPU overhead.  But if you want even less CPU overhead, you could change the first asterisk in the crontab entry to */5 to make it run every 5 minutes instead of every minute, or */10 for every 10 minutes, etc.

5. Wait a minute for the crontab to fire.  Then restart Firefox, and the preferences should be locked down.  You should be able to use this to lock down any setting in about:config.

After this the client user cant edit the preferences option any more.