Problem in connecting Wifi in Ubuntu 14.04 LTS after upgrading?

Hi all,

Recently i upgraded my Operating System to Ubuntu 14.04 LTS from ubuntu 12.04 LTS  in my Dell Vostro laptop. But after upgrade has finished i found my wifi connection not working in Ubuntu 14.04.

I checked #ifconfig -a, but wlan0 is not listed in the list of interfaces.

After some research i found the solution.

Here i'm providing some commands to troubleshoot your wlan interface.

> Check all the wireless devices available in the system and their state (block or unblock)

How to mount ISO image (ISO13346 or UDF, ISO9660) in Ubuntu

ISO image is an archieve file also known as disk image of optical disk. These images are used to write optical discs. Most of the bootable software/OS available in image file.

There are two main file systems of ISO file, They are ISO 9660 and ISO/IEC 13346. ISO 9660 filesystem(fs) is used with CD ROM, and ISO 13346(also known as Universal Disk Format(UDF)) is used with the DVD or blueray disks.

Some times we have ISO images, we need to extract the content of the image file.Some images are in ISO 9660 file system and some images are in UDF fs. So to mount these types of images in ubuntu follow the given procedure.

For ISO 9660 file system

• Create a directory in the /media directory with myiso or any name

           #cd /media

           #mkdir myiso

How to change bluetooth device name in Ubuntu 12.04

Some times it is confusing when we want to send data through bluetooth device in ubuntu, when all the near by systems having the same name. So we can't find the target system to whom we send. So in this case we want to give a specific name to bluetooth on the target system.

However in Ubuntu 11.10, the bluetooth device name will be the system name(hostame) with device number. In Ubuntu 12.04 the bluetooth device name is defaultly ubuntu-0.

So to change the BT device name type the following command in terminal

How to remove icons in the gnome panel of Ubuntu

Gnome classic panel is the very popular in the Ubuntu compared to the other like unity. Unity comes defaulty with Ubuntu 11.10 and later versions. In Ubuntu Linux, gnome classic Panel allows us to drag and drop the applications as icons as shortcut icons to quick launch applications. 

And when users want to remove or move these icons by right clicking on the icon it does not give the option to remove as it only have options Launch and Properties.

How to display Line Numbers in vi or vim editor in Linux Terminal?

Want to show line numbers in the vi/ vim editor in the linux system like ubuntu..? Ok I will explain you how to show numbers in the editor of linux in two methods.

1. Temporary Method:

1. To display line numbers in the file, open the file in vim/ vi editor through terminal

2. Press [ESC] button and : (colon) and the type “set number” then press enter,

    Eg: :set number

How to display & change Hostname in Linux system in different ways

Hii buddies, in this post let we see how to change and display the host name in the linux systems in different ways.

Generally we see the host name of linux system in the terminal window, like username@hostname:~$

To display the hostname, domain name in the terminal type the below commands

$hostname

$domainname

For Debian based Linux and Open SuSe Distribution users: 

Various other commands for display and change hostname, 

• To display hostname 

      #sysctl kernel.hostname

How to enable(open) daytime service port in Ubuntu 12.04

For enabling daytime server port in Ubuntu 12.04(or prior version) , you need to edit /etc/xinetd/daytime file.

To do this we need to follow these steps

1.check whether /etc/xinetd.d/daytime file exists or not. if exists goto step 3, if not goto step 2

2.Install xinetd by using this command

#apt-get install xinetd

or

#sudo apt-get install xinetd