Setting the E-Mail Client

You need to configure an e-mail client (MUA) before you and your users can receive and send e-mail. The MUA(s) you decide to configure depend on user preferences and which user interfaces are available on your computer. If your Red Hat Linux system has no GUI, you must choose a text-based e-mail client. The next sections show you how to configure one GUI MUA (Netscape Messenger) and three of the most popular text-based MUAs (mail, elm, and Pine). Although the steps vary for other clients, the basic concepts are the same for configuring all MUAs.

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Configuring POP3

The steps involved in setting up POP3 include:
1. Installing the package that contains the POP3 daemon
2. Editing the file /etc/inetd.conf to make POP3 services available
3. Restarting the inetd daemon to make the changes in step 2 take effect
4. Checking that the POP3 daemon is accepting connections

Your Linux operating system installation procedure may have already set up POP3 for you. Before you start setting up POP3, therefore, you should use your favorite package manager to query whether POP3 is already installed.

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Sending Files to a Ubuntu PC

Follow these steps to send files from a Bluetooth device to your PC :

1. Select Applications ➤ System Tools ➤ Bluetooth File Sharing. Nothing will appear to have happened but, in fact, a new icon will have been added to the notification area. This indicates your computer is ready for incoming Bluetooth connections.
2. On the Bluetooth device from which you wish to send the file, start the file transfer. On the Nokia 6680, I clicked the file and selected Send ➤ Via Bluetooth.
3. When the file transfer is initiated, a dialog box will appear on your computer asking if you wish to accept the file, as shown in Figure 8-17. Click OK. (If the two devices are paired, the file transfer may happen instantly without the confirmation dialog box.) The file will be saved to your /home directory.

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Installing Client for Microsoft Networks

To install File and printer sharing for Microsoft Networks :

• Click Add.
• Click Service, and then click Add in the Select Network Component Type box.
• Click Microsoft, and then click File and printer sharing for Microsoft Networks in the Select Network Service box.
• Click OK.

Restart the computer as required. After the computer restarts, you see a network login window asking for a username and password. Click Cancel for now because there are a few more items that

need to be set up.

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Install a Nvidia Driver

The Nvidia driver supports practically all Nvidia 3D cards produced in recent times everything from the latest GeForce cards to the oldest TNT cards from the mid-1990s.
To install support for Nvidia cards, follow these steps:

1. Select System ➤ Administration ➤ Synaptic Package Manager.
2. Click the Search button and enter nvidia-glx as a search term. In the list of results, click the check box next to nvidia-glx and also nvidia-settings, so that both are marked for installation. Then click Apply.
3. After the installation has completed, open a GNOME Terminal window (Applications ➤ Accessories ➤ Terminal) and type sudo nvidia-glx-config enable.
   
4. Reboot your system.
5. To further configure the Nvidia card once your PC is back up and running, open a GNOME Terminal window and type nvidia-settings

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Install an ATI Driver

To install support for ATI 3D cards, follow these steps:

1. Select System ➤ Administration ➤ Synaptic Package Manager.
2. Click the Search button and enter xorg-driver-fglrx as a search term. Find your card among those listed in the Description box. Click the box next to the entry in the results list and select Mark for Installation. Then click Apply.
3. When the Synaptic Package Manager has finished installing the driver, open a GNOME Terminal window (Applications ➤ Accessories ➤ Terminal) and type sudo fglrxconfig. This will configure your X.org configuration file to work with the ATI drivers. Note that you will need to answer some questions about your keyboard and mouse. In most cases, the default answers should work fine.
4. Once the configuration program has finished, reboot your system.
5. When the system is up and running, you will be able to further configure the card by opening a GNOME Terminal window and typing fireflcontrolpanel

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Configuring an NIS Client

After you have successfully configured at least one master NIS server, you are ready to configure one or more NIS clients. The general procedure for setting up an NIS client involves the following steps:

1. Set the NIS domain name.
2. Configure and start the NIS client daemon.
3. Test the client daemon.
4. Configure the client’s startup files to use NIS.
5. Reboot the client.

The following subsections describe these steps in detail and discuss the command and configuration file syntax. Note that there is some overlap between configuring a client and a server, so discussion emphasizes client configuration tasks. The final subsection configures an example NIS client to illustrate the process of setting up a no-frills NIS client system that connects to the server configured at the end of the previous section.

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Configure The Proxy

Some networks in offices require that you use a web proxy (often referred to as an HTTP proxy). You’ll need to speak to your system administrator to see if your office uses a proxy. If it does, your administrator will most likely give you an address, which may take the form of a web address or an IP address.

Follow these steps to configure the proxy:
1. Open a GNOME Terminal window (Applications ➤ Accessories ➤ Terminal).
2. At the prompt, type the following to open the bash.bashrc file in Gedit:
sudo gedit /etc/bash.bashrc
3. Scroll to the bottom and add the following to the file:
export http_proxy=http://username:password@address:port_number/
Replace username and password with your own details. If your proxy doesn’t use usernames
and passwords, simply leave them out (type http_proxy=http://address:port_number/).
Replace address and port_number with the relevant details.
4. Add the line shown in step 3 to the /etc/username/.bashrc file in exactly the same way.
Open the file in Gedit and add the line to the bottom of the file.
5. Save the file, and then log out and back in again.

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Install Ubuntu

Installing Linux is a surprisingly quick task and shouldn’t take more than 30 minutes on a modern PC.

Step by Step how to install ubuntu :

1. Boot from the CD-ROM
2. Select Your Language
3. Confirm Your Keyboard Layout
4. Wait During Hardware and Networking Autodiscovery
5. Set a Hostname
6. Partition the Disk
7. Wait During Automated Package Copying
8. Set the Time Zone
9. Set Your Real Name, Username, and Password
10. Install the GRUB Boot Loader
11. Reboot for the Second Installation Phase
12. Wait During Package Installation
13. Configure Your Monitor
14. Boot for the First Time

When installation has finished, the system will boot straight into the Ubuntu login screen,

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Configuring an NIS Server

The simplest NIS configuration consists of a single NIS server and one or more clients. In this case, NIS server configuration involves the following steps:

1. Setting the NIS domain name.
2. Configuring and starting the server daemon, ypbind.
3. Initializing the NIS maps.
4. Starting the NIS password daemon.
5. Starting the NIS transfer daemon if you use slave servers.
6. Modifying the startup process to start the NIS daemons when the system reboots.

If your NIS configuration also utilizes slave servers, you also need to perform configuration steps on the slave servers.

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Building a New Kernel

Rebuilding the kernel involves the following steps:

1. Downloading and installing the kernel source code
2. Configuring the kernel
3. Building the kernel
4. Building and installing kernel modules (if any)
5. Installing the kernel and setting up the GRUB boot loader

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Create a Secure Server with SSL

A secure Web server consists of two components: the SecureSockets Layer (SSL) protocol and, usually, a digital certificate from a Certificate Authority (CA). SSL provides encrypted communications and handles authentication needs between a Web browser and your Web server. A CA provides a generally accepted digital certificate and provides an additional level of authentication for your Web server because the CA guarantees that your Web server is, in fact, your Web server and not someone else’s.

To create a secure Web server, you must have at least the following four packages installed:

• apache — Provides the Apache Web server.
• mod_ssl — Installs the mod_ssl Apache loadable module, which provides strong encryption for Apache and gives Apache the ability to use SSL and its companion protocol, Transport Layer Security (TLS).
• openssl — Implements the SSL and TLS protocols and a general purpose encryption library.
• mm — Enables multiple instances of Apache to share state information.

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Setting Up a Network Interface Card

Every Red Hat Linux distribution includes networking support and tools that can be used to configure your network. In this section you’ll learn how to configure a computer for connection to an internal and external network. Even if the computer is not connected to outside networks, an internal network functionality is required for some applications. This address is known as the loopback and its IP address is 127.0.0.1.

You should check that this network interface is working before configuring your network cards. To do this, you can use the ifconfig utility to get some information. If you type ifconfig at a console prompt, you will be shown your current network interface configuration. Make sure the loopback (IP address 127.0.0.1) is working before you begin to configure your network cards. If your loopback is configured, the ifconfig shows a device called lo with the address 127.0.0.1.

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Setting up Netscape Messenger

Setting up Netscape Messenger consists of three main parts:
1. Filling out forms.
a. The Identity form tells Messenger who you are.
b. The Mail Server form tells Messenger which e-mail server to retrieve your mail from.
2. Configuring the Incoming Mail Server.
3. Configuring the Outgoing Mail Server.

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Creating the Red Hat Boot Disk

To boot Red Hat Linux for the first time and start the Red Hat Linux installation program, you need a Red Hat boot disk.

To create the Red Hat boot disk under Windows, follow these steps:
1. Open an MS-DOS window (select Start > Programs > MS-DOS Prompt).
2. In the MS-DOS window, enter the following commands at the MS-DOS prompt.

d: (use the drive letter for the CD-ROM drive)
cd \dosutils
rawrite
Enter disk image source file name: \images\boot.img
Enter target diskette drive: a
Please insert a formatted diskette into drive A: and press -
ENTER- :

3. As instructed, you should put a formatted disk into your PC’s A: drive and then press Enter. RAWRITE.EXE copies the boot-image file to the disk.

When the DOS prompt returns, remove the Red Hat boot disk from the A: drive
and label it as a Red Hat boot disk.

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