Education - simulation of concepts

 

Kids education:

https://phet.colorado.edu/

It covers the following:
Physics
Maths and statistics
Chemistry
Earth & Space
Biology

Simulations of concepts.

Check previous boot logs in Linux

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You can check how many previous boots are recorded using:

journalctl --list-boots

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journalctl -b     → Shows logs from the current boot

journalctl -b -1  → Shows logs from the previous boot (last boot before the reboot)

journalctl -b  -2 → Shows logs from the boot before the last one, and so on

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To check kernel issues in last boot:

 journalctl -b -k -1

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