Download latest package metadata.
Section: APT and Debian/Ubuntu
Refresh package index
bash
bash
sudo apt updateExplanation
Run before installs or upgrades so package metadata is current.
Learn the surrounding workflow
Compare similar commands or jump into common fixes when this command is part of a bigger troubleshooting path.
Related commands
Same sheet · prioritizing APT and Debian/Ubuntu
Upgrade installed packages
Upgrade installed packages without removing old ones.
Perform full upgrade
Handle dependency changes and package removals if needed.