How to Disable or Enable Guest Session in Ubuntu 12.04

What is Guest Session:-The Ubuntu Guest Session feature provides a convenient way, with a high level of security, to lend your computer to someone else. A guest cannot view the home folders of other users, and by default any saved data or changed settings will be removed/reset at logout. It means that each session starts with a fresh environment, unaffected by what previous guests did.

Want to disable the guest account from showing up on the logon screen? Ubuntu 12.04 comes with a guest account that can be used by guests to access the system.

First open terminal (Ctrl+Alt+T)

and than type this command on the terminal sudo gedit /etc/lightdm/lightdm.conf

now give system password and press enter.

You will get Text editor in that you will see this lines

[SeatDefaults]

greeter-session=unity-greeter

user-session=ubuntu

now you add this line allow-guest=false

at the bottom of the file like this

[SeatDefaults]

greeter-session=unity-greeter

user-session=ubuntu

allow-guest=false

now save the file and restart

after restart you will see there is no Guest Session on the logon screen.

Want to Enable Guest Session:- go to Terminal and type this command sudo gedit /etc/lightdm/lightdm.conf

after opening Text editor you will see this lines

[SeatDefaults]

greeter-session=unity-greeter

user-session=ubuntu

allow-guest=false

just remove allow-guest=false line on that file and save that file.

Now restart the system, you will see Guest Session on the logon screen

Enjoy!

Allu John Sudhakar
System/Network Administrator
to see my Blogger (for Ubuntu)http://allujohnsudhakar.blogspot.com
any help mail to me aj_sudhakar@yahoo.co.in

Speed up your Ubuntu 12.04 with preload application

what is preload application:- Preload is nice little application that could make your linux system a lot faster. Preload is an adaptive readahead daemon. It monitors applications that users run, and by analyzing this data, predicts what applications users might run, and fetches those binaries and their dependencies into memory for faster startup times.

Preload packages are available for almost all linux distributions. And it is available by default in the Synaptic Package Manager and Ubuntu Software Center in Ubuntu. Alternatively, you can install it via Terminal. Type this command

sudo apt-get install preload

Thats it. Preload will run silently in the background. If you want to further tweak Preload, conf file is available at /etc/preload.conf.

Note that installing preload will not make your system boot faster and that preload is a daemon that runs with root privileges.

And see the difference.

Allu John Sudhakar
System/Network Administrator
to see my Blogger (for Ubuntu)http://allujohnsudhakar.blogspot.com
any help mail to me aj_sudhakar@yahoo.co.in

How to Install Team Viewer Version 7 on Ubuntu 12.04 “Precise Pangolin”

What is TeamViewer:- it is a remote control application. Team Viewer provides easy, fast and secure remote access to Linux, Windows PCs, and Macs.
Team Viewer is free for personal use. You can use Team Viewer completely free of charge to access your private computers or to help your friends with their computer problems.
To download Team Viewer for Ubuntu System go to this URL
 http://www.teamviewer.com/en/download/index.aspx
Select open with Ubuntu Software Centre (default)
After downloading is completed you will see Ubuntu Software Centre box in that just press Install Button.
Now you will get Authenticate box just give your system password
After installation is over now you go to Dash Home and type Team Viewer and open that one
After opening Team viewer you will get Team Viewer License Agreement in that you will press Accept License Agreement Button
After that you will see Team Viewer box in that Left side Your ID XXX XXX XXX
And Password   XXXX
Right side you have to type Partner ID and press Connect button to connect your Partner system and enjoy
To setup Team viewer to start up every time you login
Go to start up applications
Click “Add”
Now you will see a box called Add Startup Program box
Now In Name place Type Start Team viewer
        In Command place type /usr/bin/teamviewer
And now press Add button
And press close button.
After you restart Team viewer will open automatically
Do it same and enjoy
Allu John Sudhakar
System/Network Administrator
to see my Blogger (for Ubuntu)http://allujohnsudhakar.blogspot.com
any help mail to me aj_sudhakar@yahoo.co.in

How to see system services are enable or disable in ubuntu 11.04(Natty Narwhal)

what is chkconfig

Chkconfig is a utility to update and query runlevel information for system services.  Chkconfig manipulates the numerous symbolic links in /etc/init.d/, to relieve system administrators of some of the drudgery of manually editing the symbolic links.

In Debian, there are several tools with similar functionality, but users coming from other Linux distributions will find the tools in this package more familiar.

Go to Terminal and open it and type the command “chkconfig' press enter.

john@john:~$ chkconfig

The program 'chkconfig' is currently not installed.  You can install it by typing:

sudo apt-get install chkconfig

“If chkconfig is not intall you will see the  above massage”

to install “chkconfig”thpe this command “sudo apt-get install chkconfig”

john@john:~$ sudo apt-get install chkconfig

Reading package lists... Done

Building dependency tree      

Reading state information... Done

The following packages were automatically installed and are no longer required:

  linux-headers-2.6.38-8 linux-headers-2.6.38-8-generic

Use 'apt-get autoremove' to remove them.

The following NEW packages will be installed:

  chkconfig

0 upgraded, 1 newly installed, 0 to remove and 1 not upgraded.

Need to get 9,222 B of archives.

After this operation, 69.6 kB of additional disk space will be used.

Get:1 http://in.archive.ubuntu.com/ubuntu/ natty/universe chkconfig all 11.0-79.1-2 [9,222 B]

Fetched 9,222 B in 0s (9,989 B/s)   

Selecting previously deselected package chkconfig.

(Reading database ... 187622 files and directories currently installed.)

Unpacking chkconfig (from .../chkconfig_11.0-79.1-2_all.deb) ...

Processing triggers for man-db ...

Setting up chkconfig (11.0-79.1-2) ...


after installing just type “chkconfig”
you can see list of service which one is off or on in your system

john@john:~$ chkconfig

acpi-support                                      2345

acpid                                                    off

alsa-restore                                          off

alsa-store                                              off

anacron                                                off

apparmor                                             on

apport                                                  off

atd                                                        off

avahi-daemon                                       off

binfmt-support                                      on

bluetooth                                              on

bootlogd                                              off

brltty                                                    on

clamav-freshclam                                on

console-setup                                      off

cron                                                    off

cups                                                    off

dbus                                                   off

dmesg                                                off

dns-clean                                           on

failsafe-x                                           off

gdm                                                   off

grub-common                                    on

hostname                                           off

hwclock                                             off

hwclock-save                                     off

irqbalance                                         off

kerneloops                                         on

killprocs                                             on

module-init-tools                                off

network-interface                              off

network-interface-security                off

network-manager                              off

networking                                         0

ondemand                                          on

pcmciautils                                        on

plymouth                                           off

plymouth-log                                     off

plymouth-splash                                off

plymouth-stop                                   off

plymouth-upstart-bridge                   off

pppd-dns                                           on

procps                                              off

pulseaudio                                        on

rc.local                                            on

rcS                                                  off

rsync                                               on

rsyslog                                            off

saned                                              on

sendsigs                                           0

setvtrgb                                           off

speech-dispatcher                           on

stop-bootlogd                                 off

stop-bootlogd-single                      off

sudo                                               on

udev                                               off

udev-fallback-graphics                  off

udev-finish                                     off

udevmonitor                                  off

udevtrigger                                   off

ufw                                                off

umountfs                                         0

umountnfs.sh                                  0

umountroot                                    0

unattended-upgrades                     0

urandom                                       0S

winbind                                         on

x11-common                                 on

How to see system services are enable or disable in ubuntu 11.04(Natty Narwhal)

Allu John Sudhakar
System/Network Administrator
to see my Blogger (for Ubuntu)http://allujohnsudhakar.blogspot.com
any help mail to me aj_sudhakar@yahoo.co.in

How to install Ubuntu restricted extras in Ubuntu11.04 (Natty Narwhal) commonly used applications with restricted copyright (mp3,avi,mpeg,True Type,java,Flash,Codecs)

This package depends on some commonly used packages in the Ubuntu multiverse repository.

Installing this package will pull in support for MP3 playback and decoding, support for various other audio formats (GStreamer plugins), Microsoft fonts, Java runtime environment, Flash plugin, LAME (to create compressed audio files), and DVD playback.

Please note that this does not install libdvdcss2, and will not let you play encrypted DVDs. For more information, see https://help.ubuntu.com/community/RestrictedFormats/PlayingDVDs

Please also note that packages from multiverse are restricted by copyright or legal issues in some countries. See http://www.ubuntu.com/ubuntu/licensing for more information.

To install this you have two way 1. Ubuntu Software Center 2. Through Terminal

1. Go to Ubuntu Software Center and type in surch box Ubuntu Restricted Extras

and press Install button

2. Through Terminal

To get started, press Ctrl – Alt – T on your keyboard to open Terminal.
When Terminal opens, type the command below and press Enter to install.

sudo apt-get install ubuntu-restricted-extras

Allu John Sudhakar
System/Network Administrator
to see my Blogger (for Ubuntu)http://allujohnsudhakar.blogspot.com
any help mail to me aj_sudhakar@yahoo.co.in

How to install K3b Disk writing program in ubuntu 11.04

K3b provides a comfortable user interface to perform most CD/DVD burning tasks. While the experienced user can take influence in all steps of the burning process the beginner may find comfort in the automatic settings and the reasonable K3b defaults which allow a quick start.

If you want to install K3b goto ubuntu software center and type K3b in such box

and press install button

After installation is over open K3b

when you open for first time you will see a box called “Did you know...? read that and press Next button. After reading all close that box and use K3b for CD/DVD burning tasks.

You want to Add-ons for K3b select six add-ons and press Apply Changes button

that all you can use it now 

If you want to install K3b through Terminal window

follow the this commands

To install K3b

sudo apt-get update

sudo apt-get install k3b
Preview audio tracks withing the play list editor is one of the features in K3b, you need to install and start arts sound server for this
sudo apt-get install arts

artsd &
you may need to install mp3 plugin for built-in decoding software.
sudo apt-get install libk3b2-mp3
Enjoy now 

Allu John Sudhakar
System/Network Administrator
to see my Blogger (for Ubuntu)http://allujohnsudhakar.blogspot.com
any help mail to me aj_sudhakar@yahoo.co.in

How to solve “cannot display this video mode optimum resolution 1280 * 1024 60 Hz” problem in ubuntu 11.04 and windows 7 (Dual booting)

After installing windows 7 and ubuntu 11.04 in a system some times you will not see GNU GRUB. You will get “cannot display this video mode optimum resolution 1280 * 1024 60 Hz” massage on monitor and it will open ubuntu 11.04 directly and you can not chose between ubuntu 11.04 or windows 7

To solve this problem first update system through Terminal type this command $ sudo apt-get update

After update is over you go to update manager and see any updates are available if updates are there just update them. After that you go to “ubuntu software centre” and type “startup-manager” in such place and enter. You will see startup-manager and just press install button it will install

Now open startup-manager

You will see by default operating system is ubuntu 11.04

You have to put Display resolution as 640 * 480

Colour depth as 8 bits

(You have to select both show boot splash and show text during boot)

Misc [*] show boot splash

[*] show text during boot

And go to advanced put boot loader menu resolution is 640 * 480 and close now and restart the system

This time you will see this

GNU GRUB VERSION 1.99 rc1-12 UBUNTU 1

Ubuntu, with Linux 2.6.38-8-generic

Ubuntu, with Linux 2.6.38-8-generic (Recovery mode)

Previous Linux versions

Memory test (Memest 86+ )

Memory test (Memtest 86+, serial console 115200)

Windows 7 (loader) (on/dev/sda 1)

Now you can select ubuntu or windows

Enjoy now

Allu John Sudhakar
System/Network Administrator
to see my Blogger (for Ubuntu)http://allujohnsudhakar.blogspot.com
any help mail to me aj_sudhakar@yahoo.co.in