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Having [[:wikipedia:Superuser|root]] access is an important step for users interested in modifying things "under the covers" of their tablets; without it, you won't have the necessary permissions to make those modifications. Root access is disabled by default on new tablets. Thankfully, the steps to enable root access are simple.

== Why do I want root? ==

Root access is ''not'' required to install additional applications through Application Manager, open X Terminal or use your tablet in day-to-day operation.

If you want to edit the underlying system configuration, install applications ''through the command line'' or other low-level tasks, you ''will'' require root access.

== rootsh ==
''Note: As rootsh is the simplest option, and does not require a desktop computer or running additional services, it is the recommended method for gaining root access.''

<code>rootsh</code> is available in [[Extras]], and can be installed from the Application manager if you have the Extras repository enabled. It is also available directly from [http://maemo.org/downloads/product/Maemo5/rootsh/ maemo.org].

Then, from the [[terminal|shell]], run:
 sudo gainroot
(or <code>root</code> for short). This will give you a root shell.

== sudser ==
''Note: Some scripts require rootsh to run properly, so it's recommended to have both sudser and rootsh installed if you're using sudser.''

sudser adds the user to sudoers so you can use the <code>sudo</code> command to run commands as root.

It is available in Extras, and can be installed from the Application manager if you have Extras enabled.

Then, from the shell, run <code>sudo ''command''</code>. This will execute <code>''command''</code> with root privileges.

''Note: Adding user to the sudoers without a password isn't best for security so use at own risk.''

== OpenSSH ==

# Enable Extras (if it is disabled)
# Install OpenSSH (client and server)
#* This will prompt you to change the root password from the default, <code>rootme</code>
# SSH into your tablet as root
#* For local access, run <code>ssh root@localhost</code>
#* For remote access, run <code>ssh root@''tablet's ip address''</code>
# Use the root password entered at step (2) to log in

To debug issues with SSH connections, use the SSH '-v' option.

(To get SSH X forwarding ('-X' option) to work, you need to install ''xauth'' (or ''xbase-clients'') package and enable X forwarding in the SSH server configuration file on the machine where you're connecting to.)

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== A note on sudo ==
This information is aimed at people who come to maemo from other linux distributions (Debian for example) that may have used sudo in a different way.

In fremantle (Maemo 5) sudo is a key part of the system. It is used by system processes that are started as the user to provide access (as root) when needed.

Examples of this are:
Media Tracker.
The firmware version on the 'Settings' > 'About Product' page.

Both of these will malfunction if there are problems with sudo.

Sudo relies on <code>/etc/sudoers</code>, a configuration file that details who can run what commands. <code>/etc/sudoers</code> is traditionally modified by using the 'visudo' command. DO NOT DO THIS ON MAEMO. In maemo sudoers is regenerated periodically from config snippets in <code>/etc/sudoers.d/</code>, using <code>visudo</code> can cause the slow death of your system as your edit gets pushed further down /etc/sudoers.

For those who don't know, <code>/etc/sudoers</code> works on a last match principle, so if your edit conflicts with entries above it, it will break those entries.

The 'correct' way to do this would be to put your entry in a file in <code>/etc/sudoers.d/</code>. I leave the detail of this up the experience of the end-user. Just be advised that using <code>visudo</code> runs the risk of subtly breaking your system.

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 (To get SSH X forwarding ('-X' option) to work, you need to install ''xauth'' (or ''xbase-clients'') package and enable X forwarding in the SSH server configuration file on the machine where you're connecting to.)
-== Research &amp; Development Mode (R&amp;D or RD Mode) ==
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-{{ambox|text=As R&D mode has other side effects beyond simply enabling root access (including several that may negatively impact battery life), it is ''not'' the recommended method for gaining root access. Use [[#rootsh|rootsh]] instead.}}
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-{{main|R&D mode}}
-You can enable the R&D mode which enables you to execute <code>sudo gainroot</code> to get a root shell, simply follow the setup steps for flashing covered in [[Updating the firmware|updating the tablet firmware]], then execute
- sudo ./flasher-3.5 --enable-rd-mode -R
-You are now in R&D mode, and the sudo gainroot script's check will be satisfied.
-== On-Device Sudoers Edit (No External Dependencies) ==
-This covers how to get root access on-device. without any external downloads/dependencies, as well as advocates a more desktop-like approach to setting up your sudoers file.
-http://talk.maemo.org/showthread.php?t=94494
 == A note on sudo ==

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