Compose Key

I often need to type characters that aren’t on the keyboard, like € ½ ÷ © ¥ or ¢.

compose key to the rescue.

pick a key on your keyboard you don’t use much, like [Insert], [CapsLock], or [menu], and make it the “compose key”.

Then to make any character, you just hit the compose key, then type the two obvious keys that, when combined, make up the character.

For example:

* To get €, just type e then =

* To get ©, just type o then c

* To get ® just type o then r

* To get £, just type L then -

* To get ¥, just type Y then =

* ¢ is c then |

* ÷ is - then :

* ½ is 1 then 2

* ¼ is 1 then 4

* ñ is n then ~

By default this function is not assigned to any key. You can tell the X server what key to use for this function with the following command
setxkbmap -option compose:keyname

for example

setxkbmap -option compose:caps

to assign it to the caps-lock key.

or setxkbmap -option compose:rwin

to assign your right "Windows" key
to make it persisistent after a reboot simply insert the command in your
/etc/rc.local file

Loads of Linux GAMES

djl is an open-source game manager for Linux, written in Python

download the installer script from http://en.djl-linux.org/?q=node/19
Once you download the file you will need to extract it.
tar -xzvf djl-1.2.20.tar.gz

The djl.sh contained inside the archive needs to be executable in order to run, so you may have to make it executable by typing the following.
chmod +x djl.sh

then to run the script, type ./djl.sh

When you run the script the first time, if you do not have the Python framework installed, you'll get an error. Fortunately The script will point out the missing python-qt4 libraries. Fire up your package manager and install it. Alternatively, use the command line to install the package.
yum install "package name" or apt-get install "package name"

Once you have everything in place, run the application. You will be asked to configure djl. This includes configuring the installation directory for your games, the Web browser of your choice, the default tab in the main menu, the font size, updates, dependencies, and more. Very convenient.

After you download the News items, you're ready to roll.


Go to Repository tab and start enjoying this powerful game manager. You can search the games by genre, or by additional categories, like license or price.

Games are just as easy to un-install as they are to install

Enjoy

Setting up a DHCP server

assuming the Network you want to add a DHCP server to is the

192.168.1.0/24 network

your router IP Address is 192.168.1.1

Your ISP's DNS servers IP Address is 194.158.2.2

the leases that you want to give out are 192.168.1.128 to 192.168.1.254

first install the DHCP server software.

yum install dhcp.i386

once installed

edit /etc/dhcpd.conf (if it doesn't exist create it)

vi /etc/dhcpd.conf

add in the following lines

ddns-update-style interim;
ignore client-updates;

subnet 192.168.1.0 netmask 255.255.255.0 {

range 192.168.1.128 192.168.1.254;

default-lease-time 21600;
max-lease-time 43200;
option routers 192.168.1.1;
option ip-forwarding off;
option domain-name-servers 194.158.2.2;
option broadcast-address 192.168.1.255;
option subnet-mask 255.255.255.0;

save the file :wq

next, configure the dhcpd service to start at start up

chkconfig dhcpd on

to make sure it is running either reboot or type
/etc/init.d/dhcpd start

that's it , your done. Your DHCP server will give out IP addresses to any clients that connect to your network.
there are many other options that you can add to your DHCP server, like reserving an IP address for a specific mac-address etc

to see all of these option just check out the man pages of dhcpd
type
man dhcpd

Source .bashrc when you connect over SSH

If your .bashrc file is not being sourced when you connect to your system over SSH and it only gets sourced when you open up a terminal locally on the system.

you may need to add the following to your etc/profile file

if [ -e ~/.bashrc ]; then
. ~/.bashrc
fi

VMWare boot from CD

VMWare can be very frustrating when you try and boot a VM from a CD .

The VM’s BIOS is set to boot from disk first, so you need to change the boot device order. The problem is that the boot process is so fast that you never have enough time to hit the F2 key and enter the bios setup to change the boot order of your VM.
A solution to the problem is to edit the .vmx file in your VM's directory and simply add the following line.

bios.bootDelay = “boot delay in milliseconds”

for example if you want to give yourself 20 seconds add the following line
bios.bootDelay = “20000”

save the file and then restart your Virtual machine.
You will now have enough time to enter into the VM's console and hit the F2 key so that you can edit the boot order in the Bios.

Right Click Open Terminal in current folder

nautilus-open-terminal runs on Gnome Windows manager and it allows you to right click in your file manager
and open up your terminal in the current folder. Clearly a very useful tool.

It used to be installed as a default application in many distributions but for some reason it was left out of Fedora 11




To add it back in simply type
sudo yum install nautilus-open terminal

If it somehow got left out of your Ubuntu installation, then type
sudo apt-get install nautilus-open terminal

You will need to restart your Gnome session to activate it.

How to Install Google Chrome on Ubuntu

edit the /etc/apt/sources.list file

sudo vim /etc/apt/sources.list

Add one of the following

For ubuntu 9.10 (armic) add the following two lines

deb http://ppa.launchpad.net/chromium-daily/ppa/ubuntu karmic main
deb-src http://ppa.launchpad.net/chromium-daily/ppa/ubuntu karmic main

For ubuntu 9.04 (Jaunty) add the following two lines

deb http://ppa.launchpad.net/chromium-daily/ppa/ubuntu jaunty main
deb-src http://ppa.launchpad.net/chromium-daily/ppa/ubuntu jaunty main

For ubuntu 8.10 (Intrepid) add the following two lines

deb http://ppa.launchpad.net/chromium-daily/ppa/ubuntu intrepid main
deb-src http://ppa.launchpad.net/chromium-daily/ppa/ubuntu intrepid main

Save the file

Next add the GPG key by typing:

sudo apt-key adv --recv-keys --keyserver keyserver.ubuntu.com 0xfbef0d696de1c72ba5a835fe5a9bf3bb4e5e17b5

Update the source list. by typing

sudo apt-get update

Install chromium by typing

sudo apt-get install chromium-browser

Done

Clone a hard Drive

Good, easy way to clone a hard drive.



dd which is used for converting and copying files, can be used as a powerful and simple image cloning application.


dd if=/dev/hda of=/dev/hdb

done

if you want to see your progress

then type in another terminal
kill -SIGUSR1 xxxx
were xxxx is the process ID of the running dd process
and the progress will report on the original terminal that you started your cloning operation on.

share a single mouse and keyboard accross multiple computers

Here's the scenario.

you have 3 PC's on your Desk. One running Linux , One running MAC OS and the other running Windows XP.

all 3 with their own Monitor .

wouldn't it be cool, to be able to use the same Mouse and keyboard for all 3 PC's. and to be able to copy and paste, Text, Images and HTML content between the PC's.

No Problem, (drum roll...) ... in steps Synergy.

Synergy lets you share a single mouse and keyboard between multiple computers with different operating systems, each with its own display.

Redirecting the mouse and keyboard is as simple as moving the mouse off the edge of your screen. Synergy also merges the clipboards of all the systems into one, allowing you to cut-and-paste between systems. it also synchronizes screen savers so they all start and stop together.

Synergy uses TCPIP to communicate mouse position and keyboard keystrokes between the PC's. So all you need for Synergy to work is to have your PC's connected to the same network. (No additional hard ware is required)

you can download synergy from http://synergy2.sourceforge.net/

and read the user guide and installation instructions from http://synergy2.sourceforge.net/running.html

Shutdown a Windows Machine from your Linux Machine

Ever need to reboot or shutdown a Windows machine on your network, from your Linux workstation.
No problem.

apt-get install samba-common package
or
yum install samba-common package



net rpc shutdown -I ipAddressOfWindowsPC -U username%password

This will issue a shutdown command to the Windows machine. username must be an administrator on the Windows machine.

Other commands are:

net rpc shutdown -r : reboot the Windows machine

net rpc abortshutdown : abort shutdown of the Windows machine

Type:

net rpc

to show all commands