![]() ![]() ![]() New versions of currently installed packages that cannot be upgraded without changing the Packages that are not already installed retrieved and installed. Packages currently installed with new versions available are retrieved and upgraded under no circumstances are currently installed packages removed, nor are Upgrade Used to install the newest versions of all packages currently installed on the system from the sources enumerated in /etc/apt/ sources.list(5). An update should always be performed before an upgrade or dist-upgrade. The indexes of available packages are fetched from the location(s) specified in Update Used to re-synchronize the package index files from their sources. Unless the -h, or -help option is given, one of the commands below must be present. ![]()
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