Notices by Yes, I Know IT ! 🎓 (yesiknowit@mastodon.social)

Merging files on a line-by-line basis with the `paste` utility
https://yesik.it/EP23

#Paste #POSIX #Utility #Linux #Unix #Shell

Find words starting with `lin` (according to `/usr/share/dict/words`):

```
look lin
```

#Linux #Look #Utility

How to use the `chattr` command to secure shared files. An interesting post by Himanshu Arora on HowtoForge.
https://www.howtoforge.com/linux-chattr-command/

BTW, `chattr` has not to be confused with `chmod`!

#Chattr #Linux #Utility

Poor's (wo)man stopwatch in your shell:

```
time read
```

#Linux #Shell #Stopwatch

csplit tweets.yaml /----/ '{*}'

Split a collection of tweets stored in a YAML file into individual items.

From https://linuxhandbook.com/csplit-command

Display a 2x3 matrix:

seq 6 | paste - - -

#Paste #Shell #Linux #Unix #POSIX #Utility

vlc -Idummy -Vcaca "Star Wars: Episode IV - A New Hope (1977).mkv"

Play #StarWars as it was originally intended by @GeorgeLucasILM back in the 70s

#VLC #AsciiArt #Linux #CommandLine

.tar, .zip, .gz--you already have seen those extensions at the end of archive files, don't you?

But what do they mean? What is the difference between those formats?

https://itsfoss.com/tar-vs-zip-vs-gz/
#Tar #Zip #Gzi #Archive #FileFormat

Split a fixed-width or delimited text file into individual columns using the `cut` command
https://yesik.it/EP22

#Cut #POSIX #Utility #Linux #Unix #Shell

`split` and `csplit`. Old friends, I used them a lot in the 1.44MB floppy disk era...

https://www.linux.com/learn/intro-to-linux/2017/8/splitting-and-re-assembling-files-linux
by Carla Schroder (https://twitter.com/CarlaSchroder)

I should definitely investigate Asciinema for my future screencasts:

https://asciinema.org/

#Asciinema #Terminal #Screencast

Excellent post by @benfrederickson showing the programming language popularity on @GitHub as of Jan, 2018
https://www.benfrederickson.com/ranking-programming-languages-by-github-users/

Do you think things have evolved since that post?

While doing some researches on the history of Solaris, I started to draw that infographic to summarize the complex and twisted path the Sun inherited operating system took to reach the situation we know today.

https://www.yesik.it/SOLARIS2017
#Solaris #illumos #OpenSolaris #Oracle #SunMicrosystems

"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

Do you want to run a Windows software on Linux? Or optimize your costs by running several virtual servers on the same hardware? In those cases, like in many other ones, virtualization is the technology to leverage.

But with so many different virtualization technologies readily available today, which one is the best for YOUR needs?
https://yesik.it/VIRT101
#VM #Containers #Emulation #Wine #CheatSheet

http://www.ostechnix.com/4-easy-ways-to-generate-a-strong-password-in-linux/

My preferred :
openssl rand 14 -base64
gpg --gen-random --armor 1 14

... but the passwords are not easy to remember. A good argument to use a password manager.
#password #linux #gpg #openssl

Nice introductory article on Awk by Justin Ellingwood (@jmellingwood):
https://www.digitalocean.com/community/tutorials/how-to-use-the-awk-language-to-manipulate-text-in-linux

Once you tried Linux, it is hard to came back to Windows. According to Will Weaton:

http://wilwheaton.net/2018/03/i-tried-turning-it-off-and-back-on-again/

In JavaScript the "empty" regular expression literal is written `/(?:)/` since the parser would erroneously take `//` as the start of a single-line comment

https://www.ecma-international.org/ecma-262/5.1/#sec-7.8.5
#JavaScript #ECMA #Empty #RegExp

In Vim, you can display the number of words, lines and characters in the current selection by pressing <g> <Ctrl-G>

#Vim #TextEditor #Tip