you need
  • account with rights to run programs as root via sudo.Typically, the first account created on Ubuntu has such rights.
  • computer must be connected to the Internet.
  • During the update is downloaded considerable amount of data from the Internet, so it is advisable to make your internet connection charged at flat rate.
Guide
1
Run terminal emulator.For example, in Xubuntu, this program is called Terminal.
Terminal window linux.
2
first step is to update the list of available packages.This is done in the command sudo apt-get update.When you first run sudo will ask to enter the password of the current user account, for the confirmation of the comm
and as root.Subsequent launches within the same session will be carried out without requiring a password.
Vypolenie apt-get update.
3
After the update package is finished, type update all installed packages sudo apt-get upgrade.
Running sudo apt-get upgrade.
4
If the package manager apt finds available updates it displays a list of upgradeable packages and ask you to continue.Press Y, to begin the process of downloading and installing updates.Please note that not all packages will be updated after this command.
Upgrading packages.
5
Depending on the speed of your Internet connection, your PC's performance and the number of updates, the update process may last for a long time - up to several hours.Have patience.As a rule, at an average PC, even the volume update takes 15-20 minutes.At the end, make sure that the update was without error, and restart the computer by typing sudo reboot, or otherwise.
The update is complete.
6
After rebooting, run the terminal emulator and enter the command sudo apt-get dist-upgrade.This command will update those packages that have not been updated command sudo apt-get upgrade because of unresolved dependencies.All actions are similar to step 4. After just restart your computer.This update procedure is completed.
Running sudo apt-get dist-upgrade.
7
steps above allows you to upgrade packages within the current distribution, which the company produces canonical at intervals of 6 months.And once in 2 years in April, the distribution is available to support long-term (LTS).I recommend that you use only the LTS distributions.However, in the case of intermediate distributions in the case of LTS on a single upgrade to a new distribution using the following command sudo do-release-upgrade.This master upgrade to the latest available distribution.Note that by default, using this wizard, you can update the LTS distribution only until the next LTS distribution.After running the command, follow the on-screen instructions and carefully read all the messages.
do-release-upgrade.