How to Install the latest version of Adobe Flash Player in Linux

1. Open a terminal window (press Ctrl + Alt + T) and run the following command:
     

sudo apt-get install flashplugin-installer 

2. When the Flash Player is installed, close the terminal window and restart your browser.

How to upgrade google chrome on linux

 To selectively upgrade Google Chrome, run this command from the terminal:

    sudo apt-get upgrade google-chrome-unstable

How to free caches in ubuntu

How to free caches in ubuntu

sudo sync && sudo sysctl -w vm.drop_caches=3

Unable to run a 32-bit program on 64-bit machine

Qs. I compiled a small "hello world" C program on Ubuntu 10.04 32 bit machine. Then I put the executable(a.out) on Ubuntu 12.10(64 bit) VMWare virtual machine and tried to execute it(./a.out). The OS does not identify the file and says 'No such file or directory'. But when I put the same executable on a Ubuntu 12.10(64 bit) running on a 64 bit laptop, it runs fine and I get the desired output. The VM is running on IBM Blade Servers. I wanted to know why the results for a VM?

Ans:
The message No such file or directory does not refer to your executable file: a.out. Instead it refers to a helper program that's needed to run the 32 bit dynamically linked executable a.out.

Source: http://askubuntu.com/questions/351827/unable-to-run-a-32-bit-program-on-64-bit-vm

PHP is running with user ID=33, but this directory is owned by the system user with ID=0

Error:PHP is running with user ID=33, but this directory is owned by the system user with ID=0

Solution:
 sudo chown -R  www-data:www-data  /var/www/X2Engine/

before changes it was

drwxrwxrwx 3 root root    4096 Mar  4 16:24 X2Engine

--
Pranaw Kumar
C-DAC MUMBAI
Ph-(+91) (22) 26201606

How to enable or activate the apache mod_rewrite module

sudo a2enmod rewrite

then restart apache by

/etc/init.d/apache2 restart

How to change Apache Document root Directory in Ubuntu 13.10

http://www.binarytides.com/install-apache-ubuntu-13-10/