apt get update fails after VM snapshot reset

After you reset your VM to a snapshot including RAM you might have to time from the VM snapshot still active. So your apt get using https might fail due to the wrong time: "*update source* is not valid yet (invalid for another 46min 26s)".

Example:

[11:14:04] root@linubu22nf435:~#
[11:14:07] root@linubu22nf435:~# date
Tue 31 Oct 2023 11:14:08 PM CET
[11:14:08] root@linubu22nf435:~#
[11:14:08] root@linubu22nf435:~# apt update && apt install -y software-properties-common
Hit:1 http://ppa.launchpad.net/ondrej/php/ubuntu focal InRelease
Hit:2 http://archive.ubuntu.com/ubuntu focal InRelease
Hit:3 http://archive.ubuntu.com/ubuntu focal-backports InRelease
Hit:4 http://archive.ubuntu.com/ubuntu focal-security InRelease
Ign:5 https://download.webmin.com/download/repository sarge InRelease
Get:6 http://archive.ubuntu.com/ubuntu focal-updates InRelease [114 kB]
Hit:7 https://download.webmin.com/download/repository sarge Release
Reading package lists... Done
E: Release file for http://archive.ubuntu.com/ubuntu/dists/focal-updates/InRelease is not valid yet (invalid for another 46min 26s). Updates for this repository will not be applied.
[11:14:20] root@linubu22nf435:~#
[11:14:23] root@linubu22nf435:~# sudo hwclock --hctosys
[11:15:06] root@linubu22nf435:~#
[12:37:53] root@linubu22nf435:~# date
Tue 31 Oct 2023 12:38:27 PM CET
[12:38:27] root@linubu22nf435:~#
[12:38:28] root@linubu22nf435:~#
 

Using sudo hwclock --hctosys you update your time and apt get and apt install with https should work fine again.

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