Aptitude safe-upgrade This command will upgrade as many packages as it can upgrade without removing existing packages.

Aptitude safe-upgrade vs full-upgrade. Full-upgrade apt-get8 performs the function of upgrade but will remove currently installed packages if this is needed to upgrade the system as a whole. So upgrade command will be run after update command. Recently since Ubuntu 710 the aptitude action upgrade is deprecated.

Three of the upgrade modes full safe and its alias yes required aptitude up to 23 since 24 apt-get is used as a fall-back. This command is less conservative than safe-upgrade and thus more likely to perform unwanted actions. Aptitude is an Ncurses and command-line based front-end to numerous Apt libraries which are also used by Apt the default Debian package manager.

This command will download packages and upgrade accordingly. On a sidenote I found that enzotibs solution without the single quotes around the U didnt work for me. From the aptitude manpage.

Erase downloaded package files forget-new. Use the full-upgrade command to upgrade those packages as well. Aptitude is text based and run from a terminal.

Sudo apt upgrade Apt-GetApt Dist-Upgrade. It is the same algorithm used in safe-upgrade. Because safe-upgrade always uses the safe resolver it does not accept the --safe-resolver flag.

Upgrades installed packages to their most recent version removing or installing packages as necessary. Aptitude safe-upgrade upgrades currently installed packages and can install new packages to resolve new dependencies but never removes packages. It is the same algorithm used in safe-upgrade.