baltakatei

“Create a python script to count the number of r characters are present in the string strawberry.”

The number of 'r' characters in 'strawberry' is: 2

Based on my cheatsheet, GNU Coreutils, sed, awk, ImageMagick, exiftool, jdupes, rsync, jq, par2, parallel, tar and xz utils are examples of commands that I frequently use but whose developers I don’t believe receive any significant cashflow despite the huge benefit they provide to software developers. The last one was basically taken over in by a nation-state hacking team until the subtle backdoor for OpenSSH was found in 2024-03 by some Microsoft guy not doing his assigned job.

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What’s with that si parameter?

Maybe try out FreedomBox? freedombox is a Debian package which automatically sets up apache2, firewalld, fail2ban and Letʼs Encrypt. It also automatically adds pre-canned configuration files for applications you install with it (e.g. Mediawiki, WordPress, Matrix, Postfix/Dovecot). The theoretical goal of FreedomBox is to allow anyone to set up a webserver and administer it via a webUI. So, although I would say itʼs not quite there yet for command-line-illiterate users, I have found the software useful as a turnkey server to see what makes certain web applications tick, albeït in mostly vanilla form.

For example, after installing a new app like WordPress, you could examine what exactly the FreedomBox scripts changed in the /etc/apache2/ or /etc/fail2ban/ configuration files.

If it’s anything like SMTP on a Mediawiki or Discourse instance (example notes, then what you probably need is something called “transactional email” (I’m guessing you’re looking at a guide like this?). I’ve made use of this guide for looking up vendors for that service.

In theory, the same server hosting a Lemmy service could also send and receive emails. However, in practice there’s a high probability of these emails landing in spam boxes. The defacto proof-of-work hurdle that inhibits email spam today is paying commercial transactional email companies a monthly fee. I’m hopeful that one day self-hosted email server software will become easier to set up through things like FreedomBox (via Postfix, Dovecot, and Rspamd), but the fundamental reputation problem remains, imo.

So, I doubt a Lemmy setup guide would automatically take care of email setup. In any case, the process involves creating at least one MX record (according to instructions provided by your transactional email service) with your DNS provider which depends on the name servers you have configured for your domain registrar. The transactional email service you select should provide instructions for what port to open, as well as what SMTP URL, user name, password, and postmaster email address to provide to Lemmy.