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Right now by default iam logged in with my account and i want to access some files/folders in my machine, but iam unable to access(also no copy/paste) those because iam not logged in as root user. So is there a way to gain root access over those files/folders in Ubuntu. I know i can do su in command prompt and change the permissions but what is the other way to gain root access.

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See also Get root access for copying files to /usr/share/…? on Ask Ubuntu, and (not Ubuntu-specific so not everything will apply) How do I run a command as the system administrator (root). –  Gilles Dec 1 '10 at 0:35
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4 Answers

gksu nautilus

is probably what you want. If you enter it in a terminal or with Alt+F2, it will first ask for your password and then open a folder view of your home directory, from where you can navigate normally. Or you could use

gksu nautilus foldername

to access the folder you want directly. If you are using Kubuntu, replace "nautilus" with "dolphin".

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CarlF is on point. sudo is the command that you want to use to act as a root user.

You must prefix all of your commands with sudo in order to act as the root user. Also, in Ubuntu, there is no root user that you can log in as (unless you re-enable it or you su to it from another user), so the computer does not have a root password -- you only have to provide your own password if you exist in the sudoers file in /etc (I believe) in order to gain root capabilities.

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There is a root user. It's just not allowed to log in. –  Mechanical snail Jul 28 '12 at 0:57
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Try typing man sudo.

This will open the manual page for the sudo command.

sudo is used to perform a given command with superuser privileges.

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why can't i directly access a folder by providing my root password for authentication :( –  dsharma Nov 30 '10 at 19:08
    
You must prefix all of your commands with sudo in order to act as the root user. –  Nitrodist Nov 30 '10 at 19:23
    
If you want to enter a bunch of commands as root in Ubuntu and don't want to type the bothering sudo everytime, do a "sudo su" to change into superuser. But remember to do an "exit" as soon as you're done doing root stuff... –  celebdor Nov 30 '10 at 19:33
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Actual there is a root account on ubuntu. Hera step by step tutotial how to get on the root accout.

username@pcname:~$ sudo -i
[sudo] password for username: *****

After this you see something line this below.

root@pcname:~# 

!! This enables onlt the root account. It has no password yet. Just typ passwd when you are in root and you can set a new password.

when you want to disable the root account you can just typ

username@pcname:~$ sudo passwd -dl root

More information of this can be found on here (Ubuntu documentation)

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