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Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).

Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.

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Where to start finding what makes unattended-upgrades behave inconsistently on Debian? (lemmy.ml)

submitted 12 hours ago by monovergent@lemmy.ml to c/linux@lemmy.ml

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A while ago, I set up unattended-upgrades on my Debian 13 machines. Running sudo apt updatedoesn't cross my mind now that I assume unattended-upgrades takes care of that for me, but every once in a while, I'll try installing something and get the "Unable to locate package" errors associated with outdated repositories. After being made aware of having outdated repositories and packages, I'll go and run sudo apt update && sudo apt upgrade on my other machines, only to be told that all packages are up to date and unattended-upgrades did do its job there. I don't keep a record of this happening, but I also don't recall there being any pattern to which of my machines are affected and which aren't at any given time.

Where could I start hunting down the cause of this inconsistent behavior? I did double-check that I enabled it via sudo dpkg-reconfigure unattended-upgrades

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[–] Overspark@piefed.social 9 points 12 hours ago

I think unattended-upgrades only runs once a day by default, and the repository index could have changed since then. Different results on different machines can be because unattended-upgrades didn't run at the same time, or from the same mirror (and mirrors take a while to propagate changes). Generally speaking you should always run an apt update directly before installing new packages.