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Cake day: January 1st, 2024

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  • I’ve been hosting my own email server having 4 domains (one is business-related) for 6 years. I don’t have any problems, because I know what I do.

    In case it’s a help. The stack is: Postfix (SPF-support), Dovecot (Sieve), OpenDKIM, OpenDMARC and rspamd. I also recommend fail2ban, because an open infrastructure is hammered on very often.

    Of course TLS is needed, so nginx with acme.sh as combo does the job fine.

    Backups are also essential. I like restic. CLI tools are automated very easy.

    I don’t think, it’s much. My setup is very generic, but maybe it’s already too overwhelming for some people.













  • Suzune@ani.socialtoScience Memes@mander.xyzFuck geometry
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    2 years ago

    Please be careful with two different things. Complex numbers have two components. Distances don’t. They are scalars. The length of the vector (0,1) is also 1. Just as a+bi will have the length sqrt(a^2 + b^2). You can also use polar coordinates for complex numbers. This way, you can see that i has length 1, which is the distance from 0.

    The triangle in the example above adds a vector and a scalar value. You can only add two vectors: (1,0) + (0,1) which results in (1,1) with the proper length. Or you can calculate the length/distance (absolute values) of the complex numbers directly.