What are phased updates, and why does Ubuntu use them?
Also worth adding, as explained in the apt-preferences docs, that Phased Updates depend upon each machine's Machine ID, which maybe found (and potentially altered/copied - but generally one should avoid changing it as mentioned by @Daniel) in /etc/machine-id.
What does apt-get --fix-missing do and when is it useful?
(2-3) When you install/upgrade with apt-get upgrade or with apt-get install somepackage, usually apt tries to update dependencies. This means that it may find that some packages need new or updated versions of existing packages, and so on in a cascade of dependencies.
Where are the logs for apt-get? - Ask Ubuntu
Jul 29, 2019 · Of course, cat /var/log/apt/term.log will display the file contents just fine. You may also be interested in tail -f /var/log/apt/term.log. This only displays the last few lines (tail) of the file, and, more interestingly, will continually print whatever gets appended to that file. This is quite interesting if you want to "observe" the log.
apt - How to list all installed packages - Ask Ubuntu
Jun 8, 2016 · source: man apt-clone. APT-Clone is used by ubiquity (Ubuntu installer) for upgrade process. It is much better than the dpkg --get-selections solution because: It preserves all repositories information. It keeps track of what packages were automatically installed. It allows to repack locally installed DEB files.
apt - How can I see all versions of a package that are available in …
That's why I'd suggest always using apt-cache policy <package-name> instead. Note about output: I have some local repository setup and both of the command shows those as well. Note 2 Newer apt comes with policy integrated into them. So, you can use apt instead of …
apt - Where can I look up my update history? - Ask Ubuntu
Apr 30, 2014 · As an alternative to lgarzo's answer, you can grep what you are interested in from /var/log/dpkg.log.E.g., if you want to see everything you installed or upgraded yesterday, you could run:
How to install specific version of some package? - Ask Ubuntu
sudo apt-get install <package name>=<version> Example: $ sudo apt-get install gparted=0.16.1-1 Reading package lists... Done Building dependency tree Reading state information... Done gparted is already the newest version. 0 upgraded, 0 newly installed, 0 …
apt - Force update from unsigned repository - Ask Ubuntu
Feb 13, 2016 · Another generic solution would be. sudo apt-key adv --keyserver pgp.mit.edu --recv-keys 5C808C2B65558117 Note: I didn't test the solution with this repository but I did it with Skype repository and it worked just fine.
"Unable to locate package" while trying to install packages with …
Dec 2, 2016 · When apt-get install is unable to locate a package, the package you want to install couldn't be found within repositories that you have added (those in in /etc/apt/sources.list and under /etc/apt/sources.list.d/). The following (general) procedure helps to solve this: Make sure you have enabled Ubuntu repositories:
apt - How can I download THEN install packages? - Ask Ubuntu
Jan 31, 2021 · For example, if you download a package and its dependencies, you need to provide all packages to dpkg, and the package management marks the dependencies as manually installed. If you would have installed them with apt, they would be marked as automatically installed. This helps later removal with apt-get autoremove (and aptitude). –