this post was submitted on 02 Jun 2025
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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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We recently had a funny problem. Our service ran fine, but a postgres upgrade failed because some pg internals were broken (broken ref ids). Dumping the DB also failed for the same error. Reading and writing was still fine, though. So we restored backup after backup... no dice. They all had the same issue: it was working for the service but we couldn't perform any maintenance. Ultimately we had to "manually" dump the data of the service and replay it into a fresh db. That took quite long. But that was interesting, since even the verification of the backups didn't help us notice that kind of corruption.
I have had to do similar with a db at my job.
Backups passed verification but we had a lot of weird issues, like queries getting stuck, or not returning records that were definitely there.
Ended up having to manually recreate the schema and import records from a manual data dump because something in the db file itself was messed up.