Tech Buzz :Create new user account in Ubuntu Linux from command line

use following commands:

useradd rravi

where rravi is username of new account.

options of useradd :

Usage: useradd [options] LOGIN

Options:
-b, --base-dir BASE_DIR base directory for the home directory of the
new account
-c, --comment COMMENT GECOS field of the new account
-d, --home-dir HOME_DIR home directory of the new account
-D, --defaults print or change default useradd configuration
-e, --expiredate EXPIRE_DATE expiration date of the new account
-f, --inactive INACTIVE password inactivity period of the new account
-g, --gid GROUP name or ID of the primary group of the new
account
-G, --groups GROUPS list of supplementary groups of the new
account
-h, --help display this help message and exit
-k, --skel SKEL_DIR use this alternative skeleton directory
-K, --key KEY=VALUE override /etc/login.defs defaults
-l, --no-log-init do not add the user to the lastlog and
faillog databases
-m, --create-home create the user's home directory
-M, --no-create-home do not create the user's home directory
-N, --no-user-group do not create a group with the same name as
the user
-o, --non-unique allow to create users with duplicate
(non-unique) UID
-p, --password PASSWORD encrypted password of the new account
-r, --system create a system account
-s, --shell SHELL login shell of the new account
-u, --uid UID user ID of the new account
-U, --user-group create a group with the same name as the user
-Z, --selinux-user SEUSER use a specific SEUSER for the SELinux
user mapping

CSIR UGC NET 2012 (December) answer key by various institutions

Date of CSIR UGC NET examination: 23rd December 2012
we'll publish entire(total) key as soon as we get.

The Test will be held in the subjects as given under:
1. Chemical Sciences,
2. Earth Sciences
3. Life Sciences
4. Mathematical Sciences
5. Physical Sciences

click here for made easy key:

http://www.madeeasy.in/

Ubuntu: 'E:Encountered a section with no Package: header, E:Problem with MergeList

When you try to update your system with update-manager or synaptic or apt-get or ... you receive the error message

E:Encountered a section with no Package: header,
E:Problem with MergeList /var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_natty_main_binary-i386_Packages,
E:The package lists or status file could not be parsed or opened.

(The filename /var/lib/apt/lists/... might be different)

This is caused by a problem in the local storage of the package directory.

There is a command that clears up all locally stored lists (which is part of the https://help.ubuntu.com/community/PackageManagerTroubleshootingProcedure)

Open a terminal (ctrl-alt-t) end execute these three commands:

sudo rm -rf /var/lib/apt/lists
sudo mkdir /var/lib/apt/lists
sudo mkdir /var/lib/apt/lists/partial

In most cases executing these commands solves the problem, and updating the system works again.