Sunday 25 September 2011

How do I turn off the unread message count on the Windows XP login screen?

For current logged on user:
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\UnreadMail
For all users on the computer:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\UnreadMail
On the right pane, find a value data named MessageExpiryDays. If it’s not found, create a new DWORD key namedMessageExpiryDays. Set the value of “MessegaExpiryDays” to 0, and save the setting.

Thursday 15 September 2011

Howto Install MySQL on Linux


Most of the Linux distro comes with MySQL. If you want use MySQL, my recommendation is that you download the latest version of MySQL and install it yourself. Later you can upgrade it to the latest version when it becomes available. In this article, I will explain how to install the latest free community edition of MySQL on Linux platform.
1. Download the latest stable relase of MySQL
Download mySQL from mysql.com . Please download the community edition of MySQL for your appropriate Linux platform. I downloaded the “Red Hat Enterprise Linux 5 RPM (x86)”. Make sure to download MySQL Server, Client and “Headers and libraries” from the download page.
• MySQL-client-community-5.1.25-0.rhel5.i386.rpm
• MySQL-server-community-5.1.25-0.rhel5.i386.rpm
• MySQL-devel-community-5.1.25-0.rhel5.i386.rpm
2. Remove the existing default MySQL that came with the Linux distro
Do not perform this on an system where the MySQL database is getting used by some application.
[local-host]# rpm -qa | grep -i mysql
mysql-5.0.22-2.1.0.1
mysqlclient10-3.23.58-4.RHEL4.1
[local-host]# rpm -e mysql –nodeps
warning: /etc/my.cnf saved as /etc/my.cnf.rpmsave
[local-host]# rpm -e mysqlclient10
3. Install the downloaded MySQL package
Install the MySQL Server and Client packages as shown below.
[local-host]# rpm -ivh MySQL-server-community-5.1.25-0.rhel5.i386.rpm MySQL-client-community-5.1.25-0.rhel5.i386.rpm
Preparing… ########################################### [100%]
1:MySQL-client-community ########################################### [ 50%]
2:MySQL-server-community ########################################### [100%]
This will also display the following output and start the MySQL daemon automatically.
PLEASE REMEMBER TO SET A PASSWORD FOR THE MySQL root USER !
To do so, start the server, then issue the following commands:
/usr/bin/mysqladmin -u root password 'new-password'
/usr/bin/mysqladmin -u root -h medica2 password 'new-password'
Alternatively you can run:
/usr/bin/mysql_secure_installation
which will also give you the option of removing the test
databases and anonymous user created by default. This is
strongly recommended for production servers.
See the manual for more instructions.
Please report any problems with the /usr/bin/mysqlbug script!
The latest information about MySQL is available at http://www.mysql.com/
Support MySQL by buying support/licenses from http://shop.mysql.com/
Starting MySQL.[ OK ]
Giving mysqld 2 seconds to start
Install the “Header and Libraries” that are part of the MySQL-devel packages.
[local-host]# rpm -ivh MySQL-devel-community-5.1.25-0.rhel5.i386.rpm
Preparing… ########################################### [100%]
1:MySQL-devel-community ########################################### [100%]
Note: When I was compiling PHP with MySQL option from source on the Linux system, it failed with the following error. Installing the MySQL-devel-community package fixed this problem in installing PHP from source.
configure: error: Cannot find MySQL header files under yes.
Note that the MySQL client library is not bundled anymore!
4. Perform post-install security activities on MySQL.
At a bare minimum you should set a password for the root user as shown below:
[local-user]# /usr/bin/mysqladmin -u root password ‘My2Secure$Password’
The best option is to run the mysql_secure_installation script that will take care of all the typical security related items on the MySQL as shown below. On a high level this does the following items:
• Change the root password
• Remove the anonymous user
• Disallow root login from remote machines
• Remove the default sample test database
[local-host]# /usr/bin/mysql_secure_installation
NOTE: RUNNING ALL PARTS OF THIS SCRIPT IS RECOMMENDED FOR ALL MySQL
SERVERS IN PRODUCTION USE! PLEASE READ EACH STEP CAREFULLY!
In order to log into MySQL to secure it, we’ll need the current
password for the root user. If you’ve just installed MySQL, and
you haven’t set the root password yet, the password will be blank,
so you should just press enter here.
Enter current password for root (enter for none):
OK, successfully used password, moving on…
Setting the root password ensures that nobody can log into the MySQL
root user without the proper authorisation.
You already have a root password set, so you can safely answer ‘n’.
Change the root password? [Y/n] Y
New password:
Re-enter new password:
Password updated successfully!
Reloading privilege tables..
… Success!
By default, a MySQL installation has an anonymous user, allowing anyone
to log into MySQL without having to have a user account created for
them. This is intended only for testing, and to make the installation
go a bit smoother. You should remove them before moving into a
production environment.
Remove anonymous users? [Y/n] Y
… Success!
Normally, root should only be allowed to connect from ‘localhost’. This
ensures that someone cannot guess at the root password from the network.
Disallow root login remotely? [Y/n] Y
… Success!
By default, MySQL comes with a database named ‘test’ that anyone can
access. This is also intended only for testing, and should be removed
before moving into a production environment.
Remove test database and access to it? [Y/n] Y
- Dropping test database…
… Success!
- Removing privileges on test database…
… Success!
Reloading the privilege tables will ensure that all changes made so far
will take effect immediately.
Reload privilege tables now? [Y/n] Y
… Success!
Cleaning up…
All done! If you’ve completed all of the above steps, your MySQL
installation should now be secure.
Thanks for using MySQL!
5. Verify the MySQL installation:
You can check the MySQL installed version by performing mysql -V as shown below:
[local-host]# mysql -V
mysql Ver 14.14 Distrib 5.1.25-rc, for redhat-linux-gnu (i686) using readline 5.1
Connect to the MySQL database using the root user and make sure the connection is successfull.
[local-host]# mysql -u root -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 13
Server version: 5.1.25-rc-community MySQL Community Server (GPL)
Type ‘help;’ or ‘\h’ for help. Type ‘\c’ to clear the buffer.
mysql>
Follows the steps below to stop and start MySQL
[local-host]# service mysql status
MySQL running (12588) [ OK ]
[local-host]# service mysql stop
Shutting down MySQL. [ OK ]
[local-host]# service mysql start
Starting MySQL. [ OK ]

Installation - PhpAdmin

First things first, we need to get the latest version of phpMyAdmin, at the time this tutorial was written the latest stable version was 2.5.5-pl1, and you can get it at;
The phpMyAdmin Home Page
Grab the download, then grab a terminal window and do the following;
Change to the directory where you saved the downloaded file , such as;
$cd mydownloads


Cool, now we need to move the file to the root directory of your Apache webserver, which is usually/usr/local/apache/htdocs, also, root usually owns the Apache directory structure so you'll need to do the rest as root, so; 

$su 

$password 

Now, lets move the file to where we need it; 

#mv phpMyAdmin-2.5.5-pl1.tar.gz /usr/local/apache/htdocs 

Done, now make the Apache root directory your working directory; 

#cd /usr/local/apache/htdocs 

Cool, now lets unpack the file; 


#tar -zxf phpMyAdmin-2.5.5-pl1.tar.gz 

That will take a second, then, when the machine returns the prompt, do a directory listing; 

#ls 

You should see a new directory which has been created called phpMyAdmin-2.5.5-pl1, assuming you do go ahead and get rid of the original file; 

#rm phpMyAdmin-2.5.5-pl1.tar.gz 

Now, the new directory name is a bit long, and definatley not something you want to type in all the time, so lets make it easier; 

#mv phpMyAdmin-2.5.5-pl1 phpmyadmin 

Cool, now you've renamed the directory to something a little easier to remember, now make that your working directory; 

#cd phpmyadmin 

Configuration -

Now, what we need to do is edit the config.inc.php file so it works with your setup. So using vi, or whatever your favorite editor happens to be, open config.inc.php, find the following lines, and edit them as appropriate for your setup; 

$cfg['PmaAbsoluteUri'] = ''; (Default) 
$cfg['PmaAbsoluteUri'] = 'http://www.yoursite.com/phpmyadmin/'; (Edited) 

$cfg['Servers'][$i]['user'] = 'root'; (Default) 
$cfg['Servers'][$i]['user'] = 'your_MySQL_root_user'; (Edited) 

$cfg['Servers'][$i]['password'] = ''; (Default) 
$cfg['Servers'][$i]['password'] = 'your_password'; (Edited) 

Thats it, save the file and close it. 

Now, lets see if it works, open a browser and point it to phpMyAdmin by using your site info such aswww.yoursite.com/phpmyadmin, or, localhost/phpmyadmin if you are only working locally. If all is well you should see the welcome screen for phpMyAdmin !, if you don't, then check your logs and remember, Google is your friend. If you see a page full of PHP errors, make sure you used the correct username and password when you edited the lines mentioned above. 

Now, knowing what this cool program is capable of, its probably not something you want just anyone to be able to access, luckily we can take care of that very easily using Apache 's authentication process, so lets do it ! 

Still as root make a directory to store the password file we will be creating; 

#mkdir /usr/local/apache/passwd 

Now, lets create the file and add an allowed user; 

#/usr/local/apache/bin/htpasswd -c /usr/local/apache/passwd/authpass myphp 

htpasswd will prompt you for the password you would like to assign to this user, once entered, it will create the file authpass and populate it with the information for the user called myphp. You can use whatever names you like, this is only an example. 

Now the final step, change to your Apache configuration directory; 

#cd /usr/local/apache/conf 

And again using your favorite editor, open the file named httpd.conf and find the following section; 

Options FollowSymLinks AllowOverride None 

Directly under this section add the following (assuming you used the names from the example above); 

AuthType Basic AuthName "myphp" AuthUserFile /usr/local/apache/passwd/authpass Require user myphp 

Thats it, save the file and close it, then restart Apache by issuing the following command; 

#/usr/local/apache/bin/apachectl restart 

Perfect, now fire up your browser again and point it back to your phpMyAdmin site, this time you should be prompted for a username and password before being allowed access to the site. Enter the required information, and you are in business !.

Install Joomla!

Link: http://help.joomla.org/content/view/1944/302/

Instruction Guide to Install PHP5 from Source on Linux

All Linux distributions comes with PHP. However, it is recommended to download latest PHP source code, compile and install on Linux. This will make it easier to upgrade PHP on an ongoing basis immediately after a new patch or release is available for download from PHP. This article explains how to install PHP5 from source on Linux.
1. Prerequisites
Apache web server should already be installed. Refer to my previous post on How to install Apache 2 on Linux. If you are planning to use PHP with MySQL, you should have My SQL already installed. I wrote about How to install MySQL on Linux.
2. Download PHP
Download the latest source code from PHP Download page. Current stable release is 5.2.6. Move the source to /usr/local/src and extract is as shown below.
# bzip2 -d php-5.2.6.tar.bz2
# tar xvf php-5.2.6.tar
3. Install PHP
View all configuration options available for PHP using ./configure –-help (two hyphen in front of help). The most commonly used option is –-prefix={install-dir-name} to install PHP on a user defined directory.
# cd php-5.2.6
# ./configure --help
In the following example, PHP will be compiled and installed under the default location /usr/local/lib with Apache configuration and MySQL support.
# ./configure --with-apxs2=/usr/local/apache2/bin/apxs --with-mysql
# make
# make install
# cp php.ini-dist /usr/local/lib/php.ini
4. Configure httpd.conf for PHP
Modify the /usr/local/apache2/conf/httpd.conf to add the following:
SetHandler application/x-httpd-php 
Make sure the httpd.conf has the following line that will get automatically inserted during the PHP installation process.
LoadModule php5_module modules/libphp5.so
Restart the apache as shown below:
# /usr/local/apache2/bin/apachectl restart
5. Verify PHP Installation
Create a test.php under /usr/local/apache2/htdocs with the following content
# vi test.php

Go to http://local-host/test.php , which will show a detailed information about all the PHP configuration options and PHP modules installed on the system.
6. Trouble shooting during installation
Error 1: configure: error: xml2-config not found:
While performing the ./configure during PHP installation, you may get the following error:
# ./configure --with-apxs2=/usr/local/apache2/bin/apxs --with-mysql
Configuring extensions
checking whether to enable LIBXML support... yes
checking libxml2 install dir... no
checking for xml2-config path...
configure: error: xml2-config not found. Please check your libxml2 installation.
Install thelibxml2-devel and zlib-devel as shown below to the fix this issue.
# rpm -ivh /home/downloads/linux-iso/libxml2-devel-2.6.26-2.1.2.0.1.i386.rpm /home/downloads/linux-iso/zlib-devel-1.2.3-3.i386.rpm
Preparing... ########################################### [100%]
1:zlib-devel ########################################### [ 50%]
2:libxml2-devel ########################################### [100%]
Error 2: configure: error: Cannot find MySQL header files.
While performing the ./configure during PHP installation, you may get the following error:
# ./configure --with-apxs2=/usr/local/apache2/bin/apxs --with-mysql
checking for MySQL UNIX socket location... /var/lib/mysql/mysql.sock
configure: error: Cannot find MySQL header files under yes.
Note that the MySQL client library is not bundled anymore!
Install the MySQL-devel-community package as shown below to fix this issue.
# rpm -ivh /home/downloads/MySQL-devel-community-5.1.25-0.rhel5.i386.rpm
Preparing... ########################################### [100%]
1:MySQL-devel-community ########################################### [100%]

Web browsing in linux terminal

To browse internet from the linux terminal you can use the application "elinks"
Install elinks if not installed using the command
#yum install elinks
To browse type elinks on the terminal.

Monday 5 September 2011

Enable Automatically Logon/Login Into Windows XP

1.) Click Start, and then click Run.
2.) In the “Open” box, type control userpasswords2, and then click OK.
3.) Clear the check box for Users must enter a user name and password to use this computer, and then click Apply.


Vyatta Virtual Router on ESXi 4.0

To install Vyatta Virtual router on ESXi 4.0
Downloading ISO image from Vyatta’s website
http://www.vyatta.com/downloads/index.php
Create a new Virtual Machine in ESXi
Attach the ISO downloaded to the new Vyatta Virtual Machine so it can boot from the ISO.
Configure the Vyatta Virtual Machine
Installing Vyatta
You can boot from the ISO you downloaded. because it’s also a “Live CD”
You’ll first need to login to Vyatta once it’s booted up. The default logins are (user: root pass: Vyatta) To install to the drive you will issue the command:
install-system
Configuring Ethernet Interfaces
Log on the system.
Configure the first NIC (eth0) which is going to be used for Internet access.
vyatta@vyatta> configure 
[edit] 
vyatta@vyatta# set interfaces ethernet eth0 address 192.168.2.3/24 
[edit] 
vyatta@vyatta# commit 
[edit] 
vyatta@vyatta# exit 
exit 
vyatta@vyatta>
Configure eth1 now
vyatta@vyatta> configure 
[edit] 
vyatta@vyatta# set interfaces ethernet eth1 address 192.168.3.3/24 
[edit] 
vyatta@vyatta# commit 
[edit] 
vyatta@vyatta# exit 
exit 
vyatta@vyatta>
Check interfaces configuration:
vyatta@vyatta:~$ configure 
[edit] 
vyatta@vyatta# show interfaces ethernet 
eth0 { 
address 192.168.2.3/24 
description Internet 
hw-id 00:15:5d:00:01:22 

eth1 { 
address 192.168.3.3/24 
description "subnet1:MOM 2005" 
hw-id 00:15:5d:00:01:23 
Save Configuration 
vyatta@vyatta# save 
Saving configuration to 
'/opt/vyatta/etc/config/config.boot'... 
Done 
[edit]
How to enable the Vyatta web-based GUI
vyatta@vyatta$
vyatta@vyatta# set service https
[edit]
vyatta@vyatta# commit
[edit]
OK
vyatta@vyatta#

How to Put an iPhone Into DFU Mode

To put the iPhone into DFU mode so you can do an iTunes firmware restore follow these steps:
Step One
Open iTunes and connect the iPhone to your PC or Mac.

Step Two
Press and hold the Home button and the Sleep/Wake button at the same time.


Step Three
After exactly 10 seconds release the Sleep/Wake button. Continue holding the home button until you iTunes pops up a message telling you that it has detected an iPhone in recovery mode.

Print an e-mail message and attachment

Link: http://office.microsoft.com/en-ca/outlook/HP052431731033.aspx

How to Reset Watchguard Firebox Edge to Factory Default

To set the Firebox X Edge e-Series to the factory default settings:
Disconnect the power supply.
Hold down the Reset button on the rear side of the Edge.
Connect the power supply while you continue to hold down the Reset button.
Continue to hold down the button until the yellow Attn light stays on. This shows you that the Edge was successfully restored to the factory default settings.
This process can take 45 seconds or more.
Do not try to connect to the Edge at this time. You must start the Edge one more time, as the subsequent steps show. If you do not start the Edge one more time, when you try to connect to the Edge you will see a web page that shows the message, “Your WatchGuard Firebox X Edge is running from a backup copy of firmware.” You could also see this message if the Reset button is stuck in the depressed position. If you continue to see this page, check the Reset button, and start the Edge again.
Disconnect the power supply.
Connect the power supply again.
The Power Indicator is on and your Edge is reset.
Once it's reset, you can use 192.168.111.1 to access the firebox.
By default the read password is readonly and configuration password is readwrite

Install Apache

Remove RPM Versions of the Applications
Before we start with our source code install, we need to remove all the existing RPM files for these products. To find out what RPMs are already installed, use the RPM query command:
rpm -qa
in conjunction with grep to filter your results:
rpm -qa | grep -i apache
rpm -qa | grep -i httpd
rpm -qa | grep -i php
rpm -qa | grep -i mysql
The 'httpd' search is in case you have Apache2 installed via RPM.
To remove the RPMs generated by these commands, do
rpm -e filename
for each RPM you found in the query. If you have any content in your MySQL database already, the RPM removal step should not delete the database files. When you reinstall MySQL, you should be able to move all those files to your new MySQL data directory and have access to them all again.
1. Download Apache
Download the latest version from Apache HTTP Server Project . Current stable release of Apache is 2.2.9. Move the source to /usr/local/src and extract it as shown below.
# cd /usr/local/src
# gzip -d httpd-2.2.9.tar.gz
# tar xvf httpd-2.2.9.tar
2. Install Apache
View all configuration options available for Apache using ./configure –help (two hyphen in front of help). The most commonly used option is –prefix={install-dir-name} to install Apache on a user defined directory.
# cd httpd-2.2.9
# ./configure --help
In the following example, Apache will be compiled and installed to the default location /usr/local/apache2 with the DSO capability. Using the –enable-so option, you can load modules to Apache at runtime via the Dynamic Shared Object (DSO) mechanism, rather than requiring a recompilation.
# ./configure --enable-so
# make
# make install
Note: During the ./configure, you may get the following error message.
# ./configure --enable-so
configure: error: no acceptable C compiler found in $PATH
See `config.log' for more details.
configure failed for srclib/apr
Install the gcc and the dependent modules as shown below and try ./configure again to fix the above issue.
# rpm -ivh gcc-4.1.2-14.el5.i386.rpm glibc-devel-2.5-18.i386.rpm glibc-headers-2.5-18.i38
6.rpm kernel-headers-2.6.18-53.el5.i386.rpm
Preparing... ########################################### [100%]
1:kernel-headers ########################################### [ 25%]
2:glibc-headers ########################################### [ 50%]
3:glibc-devel ########################################### [ 75%]
4:gcc ########################################### [100%]
3. Start Apache and verify installation
# cd /usr/local/apache2/bin
# ./apachectl start
Go to http://local-host, which should display the default message “It Works!”
[root@localhost RPMS]# rpm -ivh gcc-3.4.4-2.i386.rpm glibc-devel-2.3.4-2.13.i386.rpm glibc-headers-2.3.4-2.13.i386.rpm
warning: gcc-3.4.4-2.i386.rpm: V3 DSA signature: NOKEY, key ID db42a60e
error: Failed dependencies:
kernel-headers is needed by glibc-headers-2.3.4-2.13.i386
kernel-headers >= 2.2.1 is needed by glibc-headers-2.3.4-2.13.i386
Suggested resolutions:
glibc-kernheaders-2.4-9.1.98.EL.i386.rpm
[root@localhost RPMS]# rpm -ivh gcc-3.4.4-2.i386.rpm glibc-devel-2.3.4-2.13.i386.rpm glibc-headers-2.3.4-2.13.i386.rpm glibc-kernheaders-2.4-9.1.98.EL.i386.rpm
warning: gcc-3.4.4-2.i386.rpm: V3 DSA signature: NOKEY, key ID db42a60e
Preparing... ########################################### [100%]
1:glibc-kernheaders ########################################### [ 25%]
2:glibc-headers ########################################### [ 50%]
3:glibc-devel ########################################### [ 75%]
4:gcc ########################################### [100%]
4. Start Apache automatically during system startup
Modify the /etc/rc.d/init.d/httpd script and change apachectl and httpd variable to point to the appropriate new location as shown below. Please note that this httpd script was originally installed as part of the default Apache from the Linux distribution.
apachectl=/usr/local/apache2/bin/apachectl
httpd=${HTTPD-/usr/local/apache2/bin/httpd}
Now, you can perform the following to stop and start the Apache
# service httpd stop
# service httpd start
Setup the Apache to automatically startup during reboot as shown below.
# chkconfig --list httpd
httpd 0:off 1:off 2:off 3:off 4:off 5:off 6:off
# chkconfig --level 2345 httpd on
# chkconfig --list httpd
httpd 0:off 1:off 2:on 3:on 4:on 5:on 6:off

How to install GUI on Ubuntu 11.04 Server

Install the update first
1)sudo apt-get update 
2)sudo apt-get install ubuntu-desktop

How to install windows internet explorer in Ubuntu 10.04 using wine

Download Windows Internet Explorer 8 for Windows XP from Microsoft. Install using wine ubuntu$ wine IE8-WindowsXP-x86-ENU.exe