(((((((((((((((((((PLEASE READ))))))))))))))))))))))))):
Here's How To Connect Using Your Wireless Router:
Connect to a wireless network
If there is no Wireless Connection shown see Troubleshooting (the section called Troubleshooting)
Connecting using Network Manager
Network Manager (System → Administration → Network) supports Roaming mode. This allows you to connect to any available wireless network in range.
In the Taskbar click the Network Manager icon.
Select your wireless network from the list.
Enter your Network Key.
Click Connect.
Manually connecting
Select the connection and press Properties.
From the Network Name drop down box choose your router. If it is not shown your router may not broadcast its ID. In this case manually enter the ESSID.
Select the Password Type and enter your password.
If your ISP gave you a static IP address then select Static IP Address from the Configuration box.
If your router assigns IP addresses then leave the Configuration as Automatic Configuration (DHCP).
Click OK.
PLEASE READ ASWELL:
Here's How To Connect With Just The Ethernet Cable:Tools to help with network connection problems
If you have a network connection which is not working properly, you can use a few tools to help diagnose what the problem is.
Most of the tools in this section require use of the Terminal, which you can open by pressing Applications → Accessories → Terminal.
Get information about the current connection
ifconfig is intended to allow you to change the settings of your network connections, but can also be used to list information about the current connection.
Press Applications → Accessories → Terminal to open a Terminal
Type ifconfig eth1 in the Terminal and press Return, replacing eth1 with the name of your network interface if it is different.
inet addr gives the current IP address of the connection
HWaddr gives the MAC address of your network device
Check the DNS
A good way of checking if a connection is working correctly is to ping another computer on the network or the Internet.
To check if you are connected to the Internet:
Press System → Administration → Network Tools
Select the Ping tab
Type 82.211.81.158 into the Network address box and then press Ping
After a while, a graph should appear. Look at the number for Successful packets under Transmission Statistics
100% successful packets - Your computer should have a good connection to the Internet
Less than 100% successful - Your computer probably has a poor connection to the Internet or a poor wireless signal
0% successful packets - Your computer has a very bad connection, or is connected to an access point or router which is not connected to the Internet
If you get an error message which says The address '82.211.81.158' cannot be found, then there is no connection.
If the address is found then try the next stage.
Check if a connection is working correctly
A good way of checking if a connection is working correctly is to ping another computer on the network or the Internet.
To check if you are connected to the Internet:
Press System → Administration → Network Tools
Select the Ping tab
Type ubuntu.com into the Network address box and then press Ping
After a while, a graph should appear. Look at the number for Successful packets under Transmission Statistics
100% successful packets - Your computer should have a good connection to the Internet
Less than 100% successful - Your computer probably has a poor connection to the Internet or a poor wireless signal
0% successful packets - Your computer has a very bad connection, or is connected to an access point or router which is not connected to the Internet
If you get an error message which says The address 'ubuntu.com' cannot be found, then you cannot reach a DNS server.
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