Urandom warning(s) missed due to ratelimiting-foutmelding

In mei 2020 kreeg ik deze foutmelding op een server:

Urandom warning(s) missed due to ratelimiting-foutmelding

Reactie van Linode:

These messages are the result of a bug that exhausts the entropy pool on your system. 
While this pool is typically refilled over time through various actions (such as disk 
activity, keyboard timings, mouse movements, etc), you can also use a software 
solution.

Verderop in dezelfde thread:

This can cause delays in how quickly sshd (and maybe other services) become(s) available 
after boot.

I second the recommendation already given above to install haveged.

Bronnen

• https://www.linode.com/community/questions/17915/why-did-my-server-miss-urandom-warnings-due-to-rate-limiting
• https://en.wikipedia.org/wiki/Entropy_(computing)
• https://wiki.archlinux.org/index.php/Haveged
• https://www.digitalocean.com/community/tutorials/how-to-setup-additional-entropy-for-cloud-servers-using-haveged