Reports, if clock is sane and not slower than build timestamp or faster than expiration date (configurable, default currently set to 17 MAY 2033 10:00:00).

This should catch situations, where the host's clock is too much off (CMOS battery defect, user mistakenly set a very wrong date, etc.), resulting in network time synchronization tools (such as sdwdate) no longer being able to correct the clock; catch eventual bigger bugs in network time synchronization tools; and some types of attacks on network time synchronization.

1. Download the APT Signing Key.

wget https://www.kicksecure.com/keys/derivative.asc

Users can check the Signing Key for better security.

2. Add the APT Signing Key.

sudo cp ~/derivative.asc /usr/share/keyrings/derivative.asc

3. Add the derivative repository.

echo "deb [signed-by=/usr/share/keyrings/derivative.asc] https://deb.kicksecure.com bookworm main contrib non-free" | sudo tee /etc/apt/sources.list.d/derivative.list

4. Update your package lists.

sudo apt-get update

5. Install timesanitycheck.

sudo apt-get install timesanitycheck

Can be build using standard Debian package build tools such as:

dpkg-buildpackage -b

See instructions.

NOTE: Replace generic-package with the actual name of this package timesanitycheck.

• A) easy, OR
• B) including verifying software signatures

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