You may add or remove applications to an installed Yellow Dog Linux system using the application the "Package Manager" which is found via YDL Menu --> Applications --> System Tools --> Add/Remove Software.
When using the Package Manager, be very careful! If you deselect a package set and commit the chance, it will remove the entire package set from your local installation. This can be rather dangerous for you could inadvertently render your system useless if not careful. ALWAYS pay attention to the full list of items to be removed before acknowledging the modification.
"Updating" software means replacing an installed application with the latest version. You can use one of the 3 methods below:
Use Software Updater (pup, or "Package UPdater") found in via YDL Menu --> Applications --> System Tools --> Software Updater. Software Updater automates the process of updating installed packages by comparing those packages installed on your local computer and those available to you. You are then given option to download and install all packages which have available, newer versions.
(See Minor Version Upgrade, below.)
Use your YDL.net Enhanced account or the public mirrors to manually FTP download the most current updates.
If you desire to upgrade from YDL v6.x to YDL v6.y (for example), this is most easily done through the use of yum, as follows:
When upgrading from one version of Yellow Dog Linux to the next, for instance, from YDL v5.0.1 to YDL v6.0, it is best to reinstall the entire OS. Before you do this, it is prudent to backup your /home/[username]/ directory to an external storage device.
To back up your home directory:
Errata offer security updates and bug fixes, generated by the community of Linux users, pushed back up their associated authors for review and approval, and then released. Fixstars rebuilds the errata into official Yellow Dog Linux RPMs. You may download each new application using apt-get, yum, or with an FTP client.
* Fixstars maintains an End of Life Policy of one (1) year from the date of product launch (when it is first made available for download or purchase from Fixstars' on-line Store) or three (3) months following the launch of the next release, which ever is longer. At this point in time, the errata for this particular product will no longer be maintained and will be listed as unsupported.