oxo @oxo@qoto.org

A nice #endof10 course for those uncertain but want to switch over to #Linux is offered by #ABF Olofström in Sweden;

Grundläggande Linux https://www.abf.se/blekinge/kurs/grundlaggande-linux-3870538/

Have you made your #backup today?

Well as backups are concerned I consider one as none. I count online as none too, because they are too much dependent on external factors to work.

My basic rule is: at least two separate devices with recent local backups of my data. Separate those devices physically, like in two separate buildings. One is always #offsite

On top of that I have a long term #archive to which a full backup is added periodically. I never delete archived files.

Last tip: test #recovery regularly!

Tired of my struggle with git today...

I happen to have a nested git repository. Which is the public directory inside my Hugo framework. Git has a solution for that called: submodule.

But the assumption in the documentation seems to be that you add a submodule from a remote server and basically clone it. But I generate it locally.

So I have to remove public from the tracked files (git rm -r --cache) then cd into public, then git init, then git add and commit all stuff in public, then I can add the submodule from the projects root...

I think I am on the right track? Am I?

#linux #commandline #git #submodule

On a mobile phone entering the search term 'duckduckgo' in the search engine Startpage (on their website) gives me no result to the ddg website. At least not on the first page. The only offers I get are sources to install the app.
What should I say about that?
Well; surprisingly annoying.

After many years I started to build a website again, when I discovered #codeberg pages.

Last time it was pure HTML I guess and maybe I used Dreamweaver?
This time I use the #hugo framework as open source static site generator. Really a nice experience to build and see it online in a matter of seconds!
Have no clue though how there can be a secure connection though? Without having touched any TLS stuff.

Anyhow, for those who want to follow my babysteps: https://oxo.codeberg.page

Linus Torvalds activity chart looks like a heart rate monitor.

#linux #public #repo
https://github.com/torvalds

https://fightchatcontrol.eu/#contact-tool

Recently I made some neat date / time helper functions for bash / zsh.

I.e.: 'dten' gives current decimal date and timevalues with an added nanosecond epoch
(20250826_171150_1756221110.129674445)

Or: 'dtw' returns the current date-time with an added abbreviated weekday
(20250825_100736_W12_su)

Can be helpful for those living inside the shell!

#linux #bash #zsh #shell #script #date #time #epoch #nano

https://codeberg.org/oxo/dotf/src/branch/main/zsh/function/date-time.sh

Kommande: Grundläggande Linux kurs
https://www.abf.se/blekinge/kurs/grundlaggande-linux-3870538/
#abf #sweden #linux #course

Making steps into the right direction with my Rijndael cipher script. Almost done now with the key expansion and the so called g-function. Last step is implementation of the round constants.
When that is done I 'only' have to put all the stuff in a proper loop. If that works I will be happy, but the journey will not end there. A lot of testing and see how to decrypt...
😃

#linux #bash #shell #script #aes #rijndael #encryption

https://codeberg.org/oxo/tool/src/branch/main/dev/aes

Finally found my way through the Galois Fields.
The mix-colums part of the Rijndael key scheduler is done now.
Next up: generating round keys.

#linux #bash #shell #script #aes #rijndael #encryption

https://codeberg.org/oxo/tool/src/branch/main/dev/aes

In my 'baes' :) project I am struggling with Galois Fields and get field-exceeding values properly calculated.

I am home now and suddenly it struck me that probably the solution can be (note-to-self):

After multiplication with the irreducible polynomial, use a mask and a bitwise AND to keep only the lower 7 bits of the final result value.

I.e.:
value=0xA3F
mask=0x7F
result=$(( value & mask ))
So then the result will become: 0b00111111

Hopefully this will work...

#linux #bash #shell #script #aes #rijndael #encryption

https://codeberg.org/oxo/tool/src/branch/main/dev/aes