Installing, upgrading and removing packages

Not running Starting usually ~20 s

Step 8 of 8 · summary · 2 min

Summary

dpkg installs a package in two stages, unpacking and configuring; without its dependency the package stays unpacked.
dpkg --configure finishes the installation once the dependency is in place; apt install looks for dependencies in repositories.
During an upgrade dpkg asks about a conffile only if both you and the package changed it.
remove keeps the settings and a config-files record, purge deletes them too.
At the start of the lesson the program appeared but could not work: dpkg unpacked it and stopped at the dependency.

Ubuntu 24.04