Gotta Problem With WI-FI on Lubuntu-10.04

I work on Lubuntu-10.04. Accidentally I removed the desktop panel two days back. In short I lost all the icons on the panel.
I added all the icons back (which I possibly could!). One big problem I faced is ,I was helpless, “How to turn on the WI-FI, since I could not find the icon for it.” The only icon I could found was for Ethernet.
So here is the solution.
First I discovered that my wifi was not ON. I tested it with the command

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$ ifconfig

The only ethernet interface was ON.

So after that I tried this command.

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$ sudo ifconfig wlan0 up

And got the error.

    SIOCSIFFLAGS: Operation not possible due to RF-kill

Now, needed to pay attention to RF-kill.
First checked the status of Rf-kill managed devices.

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$ rfkill list

Output.

    0: hci0: Bluetooth
        Soft blocked: no
        Hard blocked: no
    1: phy0: Wireless LAN
        Soft blocked: yes
        Hard blocked: no
    2: tpacpi_bluetooth_sw: Bluetooth
        Soft blocked: no
        Hard blocked: no

which says wi-fi is soft-blocked.
So solved this problem by

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$ sudo rfkill unblock wlan

now the output is

    0: hci0: Bluetooth
        Soft blocked: no
        Hard blocked: no
    1: phy0: Wireless LAN
        Soft blocked: no
        Hard blocked: no
    2: tpacpi_bluetooth_sw: Bluetooth
        Soft blocked: no
        Hard blocked: no

now, there was no error in ifconfig.

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$ sudo ifconfig wlan0 up

now, it’s time to know the network in range. So

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$ sudo iwlist wlan0 scanning

Now time to add icon for wi-fi.
So, go to desktop panel settings and add “Manage Networks” plugin.

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