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Internet and Network Connection in Linux System



1. LAN (Wired)
2. Wireless
3. Mobile Broadband

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1. Wired (LAN)
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    Manually entering your network settings:

    If you don't have DHCP on your network then you can configure a static
        connection. You will need to enter the network settings yourself, so
        check with your network administrator or look at your router's
        settings to find out which details to use.   

1.Right click the Network Manager icon in the system notification area and click Edit Connections.      

2.Click the Wired tab, select the connection and click Edit.          

3.Click the IPv4 Settings tab and choose Manual from the Method drop down list.
       
4.Click Add and enter your IP address and other details. Enter the address of your DNS server too.

5.Click Apply. The network should now connect if you entered the settings correctly.

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2. Wireless
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To connect to a wireless network:

   1.Ensure that your wireless device is turned on.

   2.Click the Network Manager icon in the system notification area.

   3.Under Wireless Networks click on the network you want to connect to.

If you have connected to the network previously, Ubuntu will automatically connect to the network where it is available.
If you are connecting to a network for the first time, security details may be needed. If so, a dialog box will open. Enter your security details as follows.
   
            1.    In most cases the security type will be detected automatically. If
                not, select the security type from the
                Wireless Security drop-down box. This will
                depend on how the wireless network is set up. Examples of security
                types are WEP, WPA and LEAP.

              2.    Enter the password, key or other authentication details as
                appropriate. These are usually case-sensitive. If you don't know
                your wireless key, it may be printed on the bottom of your wireless
                router.     

            3.    Click Connect. If you are prompted again for
                your security details, you may have entered them incorrectly, or
                there could be a problem with your wireless setup.

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3. Mobile Broadband
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Mobile Broadband means any kind of high speed Internet connection which is provided by an external device such as a 3G USB stick or mobile phone with built-in HSPA/UMTS/GPRS data connection. Some laptops have recently been produced with mobile broadband devices already inside them.
Most mobile broadband devices should be recognised automatically when you connect them to your computer. Ubuntu will prompt you to configure the device.
   

1.The New Mobile Broadband Connection wizard will open automatically when you connect the device.             
 
2.Click Forward and insert your details, including the country where your Mobile Broadband device was issued, the network provider and type of connection (for example, Contract or pre-pay).             

3.Give your connection a name (it is up to you what name you choose) and click Apply.          

4.Your connection is now ready to use. To connect, click the Network Manager icon in the top right of the panel and select your new Connection.         

5.To disconnect, left click the Network Manager icon in the top right of the panel and click Disconnect.

If you are not prompted to configure the device when you connect it, it may still be recognised by Ubuntu. In such cases you can add the connection manually.
   
   1.Right-click the Network Manager icon in the system notification area and click Edit Connections            

   2.Select the Mobile Broadband tab.            

   3.Click Add.        

   4.This should open the New Mobile Broadband Connection wizard. Enter your details as described above.
             
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 SOURCE: LINUX
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