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I am trying to learn Linux by creating a CTF as a hobby project, and I see that an enthusiast before me have been using Ubuntu server 16.04.4 (that i have been using to analyze and get ideas from) and i am only having Ubuntu server 16.04.7 available from my office desk. What does typically this last digit indicate?

And if you have time to explain the whole "release-tree"-structure to me i would be very grateful!

Thank you for for attention, Best regards, Tom

u-boat
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    the last digit is a point release. See [this reference](https://wiki.ubuntu.com/PointReleaseProcess) – graham May 12 '21 at 09:55
  • Thank you guys for all answers, you all helped me become a little bit less of a noob! Thanks :) – u-boat May 12 '21 at 10:55
  • @Rinzwind, 16.04.2 had the 16.10 hardware stack... 16.04.5 contained the final HWE stack from 18.04... the .1 is updates only, .2 contains the first HWE stack change... (same with 20.04.2 contained the first upgrade from 5.4 to 5.8 kernel for *focal*... the .1 is the point *after* which upgrades from prior LTS can occur... not HWE related) – guiverc May 12 '21 at 12:10
  • Hi @Rinzwind, thank you for elaborating, in deed it is the overall picture/understanding that is my end-goal. Cheers mate – u-boat May 13 '21 at 09:33

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