After installing the software you need for your system, it is good practice to check for updates at regular intervals. In particular, security updates are released as soon as possible after a security flaw in any Debian software is identified.
Itis easy to update a Debian system. After updating the package cache (see the previous section on Updating your package cache) so that it holds current information on all software in the repositories, the Synaptic mark all upgrades menu item, or the apt-get or aptitude upgrade command will update all software with any newer versions available.
