How to install Git on Ubuntu?

Question

When I run this command:

apt-get install git-core

It shows:

E: Could not open lock file /var/lib/dpkg/lock - open (13: Permission denied)
E: Unable to lock the administration directory (/var/lib/dpkg/), are you root?

Solution

Prefix the command with sudo. This gives you Administrative permissions for one command (runs it as the root user). You will be prompted for your user password.

Run:

sudo apt-get install git

More information on sudo here

Note: You may also temporarily log in as root by typing sudo su

UPDATE

Since the OP posted new information with a different error:

Only one instance of the package manager/updater can be running at one time. Make sure you have no other terminals trying to install software, or that your Software Updater isn't trying to install updates. Best way to make sure of this if you're not sure is to restart, then run the command in the terminal before you do anything else.

UPDATE 2

git-core is now an obsolete package in the PPA. The package has been renamed to simply git. I have updated my answer and link accordingly.

Comments

[Manoj Chauhan]

plzz help me whtat to do

[Manoj Chauhan]

nothing happening...

[Kyle Macey]

What do you mean by "Nothing Happening"? Are you getting the same error? Are you getting something else? If so, edit your question and post the new results.

[Manoj Chauhan]

manu@manu-G31M-ES2L:~$ sudo apt-get install git-core [sudo] password for manu: E: Could not get lock /var/lib/dpkg/lock - open (11: Resource temporarily unavailable) E: Unable to lock the administration directory (/var/lib/dpkg/), is another process using it?

[Kyle Macey]

@ManojChauhan Check my edit

[Manoj Chauhan]

thanxx its working ..