Notices by Yes, I Know IT ! 🎓 (yesiknowit@mastodon.social), page 17

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

How could I have lived without knowing that?

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

Type the same command in all you `tmux` panes:
tmux setw synchronize-panes

#tmux #Terminal #Shell #CLI

"Keep your system up to date and apply security patches," said the TV after the Meltdown story.

"Review the patch before applying them," said the security expert. Indeed, the satirical (?) website https://holeybeep.ninja/ try to convince you to apply a patch supposedly improving the security of your system.

But this is the exact same opposite: by exploiting a bug in the patch program itself, it will execute arbitrary code on your system.

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=894667#19
#CVE #IT #Security #Tojan #Hoax

That's a pretty clever solution @lookbeavers

Indeed, in JavaScript the "procedural style" usually leads to the best performances. It does not necessary lead to the most elegant code, but you can always "hide" it.

If like me you like writing your JavaScript code in a functional style, you may already know the `Array.map` and `Array.filter` methods. But is there a way to combine them? And will this be a more efficient solution?

http://www.yesik.it/blog/2018-javascript-map-filter-and-reduce-compared

BTW, if you *don't* already know `Array.map` and `Array.filter`, don't panic: I introduce them on a simple to understand example in the first half of the article ;)

#JavaScript #FunctionalStyle
#Array #Filter #Map #Reduce

Take a little bit of computer history and a little bit of computer science, mix them together and you have that article that introduces the fundamental unit of measurement we use daily in computing or electronic engineering.

https://www.yesik.it/blog/2018-bit-nibble-byte-and-word

BTW, if you believe that a byte is--and always was--an 8 bits quantity, you should definitely read that!

#Bit #Byte #Octet #Nibble #Word
#BinaryArithmetic #BooleanAlgebra
#ComputerScience #ComputerHistory

All you ever wanted to know about the `x` bit:
https://www.yesik.it/blog/2018-the-x-permission-bit

#Linux #Unix #chmod

A quick reminder to myself:

• x86 ≡ Original 16 bits architecture [8086⎇]
• x86-32, IA-32 ≡ Intel 32 bits extension to x86 [80386⎇]
• x86-64, AMD 64, Intel 64 ≡ 64 bit extension to x86 [AMD Opteron⎇]
• IA-64 ≡ Intel Itanium architecture

#x86 #Itanium #AMD #Intel

After a major rewrite, I'm testing now the new version of my "tooth scheduler" based on the #Mastodon #API.

I hope this time it won't enter in an endless loop posting again and again the same message...

If you ever had to connect to an Oracle backend, you may know how painful it used to be to set up an Oracle Instance on your test/dev host.

Thanks to @Docker, it is now several orders of magnitude simpler!

https://www.yesik.it/EP18

#Oracle #Database
#Docker #Container
#Linux

Fine tune Linux Kernel I/O by setting up dirty page parameters.

https://lonesysadmin.net/2013/12/22/better-linux-disk-caching-performance-vm-dirty_ratio/

#Linux #Kernel #Cache #Disk #Tuning

Cool tutorial by @shapeshed on the &join& command. Useful to merge files based on their content.

https://t.co/rDPPbkXkdp

#Join #Linux

https://yesik.it/EP19

In this video, I will show you how to install the Raspbian operating system. But you will also learn how you can set up the boot partition of the Raspberry Pi from your Linux computer so the board will connect to your Wi-Fi network and will have SSH access enabled, *even at its very first boot*.

As always, I hope you will enjoy that video. And don’t forget to subscribe/share/comment!

#RaspberryPi #Raspbian #Linux #SSH #WiFi

When strategic defense needs meet the customer interest!

https://www.linkedin.com/pulse/french-government-consider-industrial-actors-connected-sylvain-leroux/

#IoT #Cyberdefense #France
#OpenSource

I used the #Mastodon #API to schedule my toots while I was taking a break from the social networks.

It wasn't such a success...
And by looking at my code, I realize today that 30*60*60*1000 milliseconds is not one month, but just a little bit over one day...

It's that, working late at night and in the hurry!

@steckerhalter auto-posting should be disabled now. Sorry for the inconvenience ;)

@steckerhalter Thank you for having mentioned it. I'm in vacation and it seems my scheduled content has gone in an endless loop. I will take a look at that immediately

If like me you always forget the #tar option to extract #xz compressed #archives, this railroad-style #infographics is for you:
https://yesik.it/TARCS1