Though the 64 bit flash player 10 for linux is still a beta version,it works fine on Ubuntu 9.04. Install the 64 bit flash player for Linux is quite easy.

I take my laptop to a friend's home yesterday,his internet connection is  wired connection which the MAC and IP are binded,so I couldn't connect to internet with my laptop at his home unless I modify my laptop's MAC address .I'd never modified the MAC on Ubuntu before,then after I googled and googled,finally I found the ways to modify the MAC on Ubuntu. There are 2 ways to modify the MAC address on Ubuntu :~

Sometimes we need to know how many modules are available in Apache2,for example,you want to enable mod_rewrite in Linux server,normally we need to test if the mod_rewrite module has been added first.We can use command:apache2ctl -M to test how many modules are available in Apache2.

Arch Linux doesn't offer WMware, and it is difficult to install WMware by compiling source on Arch Linux due to its different service setting in /etc,so we need to install it by yaourt

Kubuntu users probably found  that even you have set up Swiftfox as  default browser on Kubuntu but it won't work.You may try below solution which works for me:

1. Install mod_auth_mysql:

sudo apt-get install libapache2-mod-auth-mysql

2.Enable mode_auth_mysql

cd /etc/apache2/mods-enabled
sudo ln -s ../mods-available/auth_mysql.load

If you directly use sudo command to redirect  ,you will probably get error,eg:

sudo route -n> /etc/linuxine

you will get error:

By default,If you hover a file/folder and right click mouse,you will only see a  option Trash on pop-up menu for removing function.How to add a  option Delete on it so that we can delete file/folder bypasses Trash? It is very easy,just go to Nautilus->Edit ->Preferences->Behavior and tick the option"Include a Delete command that bypasses Tras" which is on the most bottom,and then you may see  option Delete already added to the pop-up menu.

This guide is based on Ubuntu,but it can be a reference for other Linux distributions as well.

Very easy ,just open your Termial and  type :

cp  /dev/cdrom filename.iso

//filename = your filename

then,press [ENTER]

The iso file will be saved in your home folder.