Yes, I Know IT ! 🎓 @YesIKnowIT@mastodon.social

Understanding "posits", an alternative to the IEEE-754 floating point formats for representing reals:

https://www.johndcook.com/blog/2018/04/11/anatomy-of-a-posit-number/ #FloatingPoint #IEEE754 #Posit

"How do you know whether a quantum computer has done anything quantum at all?"
Urmila Mahadev knows the answer

https://www.quantamagazine.org/graduate-student-solves-quantum-verification-problem-20181008/
#Quantum #Computing #Achievement

`make` is really a mythical tool in the Unix toolchest.
http://pkgw.github.io/make_for_scientists/

Many times criticized. Feared. Improved or imitated.

But still alive.

Tired of fighting against a bloated word processor when writing your latest report, novel, technical documentation or blog post?

Maybe that's the sign you ready to consider using a lightweight markup language. All you need is just a basic text editor, the knowledge of some simple and non-intrusive keywords and markup. And a processor to convert that text file to... well... whatever you want: HTML, PDF, LaTeX, ...

https://itsfoss.com/asciidoc-guide/
#AsciiDoc #Markdown #LaTeX #FOP

From `man 4 intel` on my Debian box.

Who catches the reference?
Reply with your favorite picture of Z.B ;)

#42 #Xorg #Linux #Fun #H2G2

Save time with Awk...

...and give your spreadsheet some vacations after having read that great article by the Free Software Magazine.

http://freesoftwaremagazine.com/articles/save_time_awk_print/

Strengthen your #flexbox #css skills with that nice little frog:
http://flexboxfroggy.com/

#flexboxfroggy

This is what a pool of entropy looks like in the real world.
...
Wait a minute, a "wall" of entropy...

https://youtu.be/1cUUfMeOijg

#Entropy #Pool #Random #Generator

Display the first 5 lines of a file:
sed '5q' file

#Shell #Sed #Linux

My #Bash book available both as #PaperBook and #eBook

https://yesik.it/BASH-IT-OUT/PAPER …
https://yesik.it/BASH-IT-OUT/PDF
https://yesik.it/BASH-IT-OUT
@itsfoss2 #YesIKnowIT

A great article by Carla Schroder to understand the controversial but omnipresent systemd.

https://www.linux.com/learn/understanding-and-using-systemd
#Linux #Systemd

A #Mastodon instance for #Linux Lovers
https://linuxrocks.online/about

Try that new #SocialNetwork and follow me there https://yesik.it/mastodon
#YesIKnowIT

`join` is a standard #POSIX tool to merge two text files based on their content.

https://yesik.it/EP14

#Join #Linux #Unix #TextFile #Database
#YesIKnowIT @itsfoss2

Right-align text on 80 columns:
sed -E ':a /.{80}/!{s/^/ /;ba}' file

#Shell #Sed #Linux

In AWK an action without associated pattern defaults to 1.
So those two commands are the same:

seq 10 | awk '{print}'
seq 10 | awk '1 {print}'

#Shell #AWK

How could I have lived without knowing that?

```
# copy file to the #X11 #Clipboard:
xclip -sel c < file
```
#Linux #Shell #Terminal #CLI

In Bash the pseudo-variable RANDOM returns a pseudo-random integer in the [0;32767] range

echo $RANDOM

#Bash #Random

GNU sed has a nice 'e' modifier for substitutions:
sed 's/.*/date +%F -d &/e' << EOT
now
tomorrow
yesterday
EOT

#GNU #sed #Linux

`ls -lt` will show files ordered by modification date — most recent first.

#ls #shell #linux

When you have to fight against tab completion trying to be smart:

touch a.zap
unzip a<tab> #nothing
\unzip a<tab> #completed
unzip a<esc>/<esc>/ #completed

#CLI #Shell #Bash #History #TabCompletion
#YesIKnowIT