Ubuntu 10.04 : Enable/Disable root account

Well, today I had installed Ubuntu 10.04 and my immediate action was to change the root account password, I followed the usual method  “System>Administration>Users and Groups” but couldn’t find any way to change it. Then I realized that the root account might inactive by default. I found myself correct when I searched on web.
Now, if we wished to carry out something with root permission, we need to type the keyword ‘sudo’ before the command. ‘sudo’ means superuser do. When ever we use ‘sudo’, it will prompt for the ‘Password’, to which we need to enter the specific user password.

However, we can still enable the root account by using the following command

$sudo passwd root :- This will prompt for a new root password and once you confirm it, our root account will be activated. We can further log in to root user by using the command
$su (‘su’ stands for super user)
To disable or lock the root account we can use the following command
$sudo passwd -l root

Connect Airtel-Mobile Office in Ubuntu!!?

I am using Samsung SGH-L700 and I wanted to use Airtel Mobile Office in Ubuntu. Finally when I am succeeded in configuring it in Ubuntu. I would like to share it with everyone. Here are the steps:

Before proceeding you need to make sure that wvdial package is installed in your machine.

Step1:- Just type wvdial in terminal to check if it is installed. If yes, then proceed otherwise type the following command in terminal to install.

sudo apt-get install wvdial

Step2:- Now follow these commands :

wvdialconf

This will scan and detect the serial ports of the modem which is connected. It will then edit the file called wvdial.conf which is present in /etc/ .The expected output is :

Editing `/etc/wvdial.conf’.

Scanning your serial ports for a modem.

Modem Port Scan<*1>: S0   S1   S2   S3
ttyACM0<Info>: Device or resource busy
Modem Port Scan<*1>: ACM0
ttyACM1<Info>: Device or resource busy
Modem Port Scan<*1>: ACM1
WvModem<*1>: Cannot get information for serial port.
ttyACM2<*1>: ATQ0 V1 E1 — OK
ttyACM2<*1>: ATQ0 V1 E1 Z — OK
ttyACM2<*1>: ATQ0 V1 E1 S0=0 — OK
ttyACM2<*1>: ATQ0 V1 E1 S0=0 &C1 — OK
ttyACM2<*1>: ATQ0 V1 E1 S0=0 &C1 &D2 — OK
ttyACM2<*1>: ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0 — OK
ttyACM2<*1>: Modem Identifier: ATI — SAMSUNG SGH-L700
ttyACM2<*1>: Speed 4800: AT — OK
ttyACM2<*1>: Speed 9600: AT — OK
ttyACM2<*1>: Speed 19200: AT — OK
ttyACM2<*1>: Speed 38400: AT — OK
ttyACM2<*1>: Speed 57600: AT — OK
ttyACM2<*1>: Speed 115200: AT — OK
ttyACM2<*1>: Speed 230400: AT — OK
ttyACM2<*1>: Speed 460800: AT — OK
ttyACM2<*1>: Max speed is 460800; that should be safe.
ttyACM2<*1>: ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0 — OK

Found an USB modem on /dev/ttyACM2.
Modem configuration written to /etc/wvdial.conf.
ttyACM2<Info>: Speed 460800; init “ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0″

Step3:- Now its time to make some necessary changes in your wvdial.conf file in /etc/

sudo gedit /etc/wvdial.conf

Major changes required are Phone, Username & Password. Changes are as follow:

Installation -> Ubuntu 9.04

My assumption:-I am using vmware 6.0 to install my copy of ubuntu9.04(1 GB RAM, 1 GB swap space, 8 GB hard disk). You can make it dual boot with any other operating system also. Before installing any OS first decide the following:-

1. Decide the hard disk space?

2. Decide the swap space?

3. Decide the purpose and the amount of data you need to back up?

4. Decide whether your system will have only Ubuntu 9.04 or you planning to make it dual boot with any other OS?

Insert the Ubuntu 9.04 installation disk, restart your system and following screen will appear.(If you are using vmware then start your virtual machine). Follow the steps:-

STEP 1:-

Select the option ‘Install Ubuntu‘.

ubuntu network(solution for newbies and more)

hey guys there is a great network for ubuntu going on…..

it is a place where u can discuss your doubts not just based on ubuntu but also on linux….

click on http://myubuntu.ning.com/ and sign up now!!!!!!!!!!

A place especially for the newbies and that the ideas are given preference over code….

it is often seen that in a big and great forums like ubuntu forums small doubts and problems(which are posted by people like housewife,normal human who uses linux just for entertainment,fun…etc..etc..)are neglected or ignored so you can join this room in your ubuntu network to find out solution of small and simple problems of all newbies who has just entered the world of linux…

click on http://myubuntu.ning.com/group/innovationroom

hurry up people!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!