Translations by Aleksey Kabanov

Account type:

Applying groups to files and folders

Firewall

A firewall is an application that protects your computer against unauthorized access by people on the Internet or your local network. Firewalls block connections to your computer from unknown sources. This helps prevent security breaches.

If you are running server software on your Ubuntu system (such as a web server, or an \acronym{FTP} server), then you will need to open the ports these services use. If you are not familiar with servers, you will likely not need to open any additional ports.

To open a port click on the \button{Add} button. For most purposes, the \tab{Preconfigured} tab is sufficient. Select \button{Allow} from the first box and then select the program or service required.

The \tab{simple} tab can be used to allow access on a single port, and the \tab{Advanced} tab can be used to allow access on a range of ports.

Encryption

When installing Ubuntu, it is possible to encrypt a user's home folder. See \chaplink{ch:installation} for more on encrypting the home folder.

Use the terminal to run \commandlineapp{ecryptfs-setup-private} to set up the private folder.

Enter your account's password when prompted.

Either choose a mount passphrase or generate one.

Troubleshooting

\prompt \userinput{ls /media/root} bin dev home lib mnt root srv usr boot etc initrd lib64 opt sbin sys var cdrom initrd.img media proc selinux tmp vmlinuz

Now, you can reinstall \acronym{GRUB}:

Login as usual and continue enjoying Ubuntu.

If you've deleted a file by accident, you may be able to recover it from Ubuntu's trash folder. This is a special folder where Ubuntu stores deleted files before they are permanently removed from your computer.

The image on every monitor is composed of millions of little colored dots called pixels. Changing the number of pixels displayed on your monitor is called ``changing the resolution.'' Increasing the resolution will make the displayed images sharper, but will also tend to make them smaller. The opposite is true when screen resolution is decreased. Most monitors have a ``native resolution,'' which is a resolution that most closely matches the number of pixels in the monitor. Your display will usually be sharpest when your operating system uses a resolution that matches your display's native resolution.

When installed on notebook computers from Apple \dash such as the MacBook or MacBook Pro \dash Ubuntu does not always enable all of the computer's built-in components, including the iSight camera and the Airport wireless Internet adapter. Luckily, the Ubuntu community offers documentation on fixing these and other problems. If you are having trouble installing or using Ubuntu on your Apple notebook computer, please follow the instructions at \url{https://help.ubuntu.com/community/MacBook}. You can select the appropriate guide after identifying your computer's model number. For instructions on doing this, visit the web page above.

What else can I do with Ubuntu?

To learn more about open source software, see the Open Source Initiative's open source definition, available at \url{http://www.opensource.org/docs/definition.php}.

Mythbuntu allows users to turn their computers into entertainment systems. It helps users organize and view various types of multimedia content such as movies, television shows, and video podcasts. Users with \acronym{TV} tuners in their computers can also use Mythbuntu to record live video and television shows.

The Ubuntu Forums

The Ubuntu Forums are the official forums of the Ubuntu community. Millions of Ubuntu users use them daily to seek help and support from one another. You can create an Ubuntu Forums account in minutes. To create an account and learn more about Ubuntu from community members, visit \url{http://ubuntuforums.org}.

Within the Ubuntu community are dozens of local user groups called ``LoCo teams.'' Spread throughout the world, these teams offer support and advice, answer questions and promote Ubuntu in their communities by hosting regular events. To locate and contact the LoCo team nearest you, visit \url{http://loco.ubuntu.com/}.