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

How to catenate files scattered through several sub-directories?
https://yesik.it/blog/2018-catenate-files-from-subdirectories

#Linux #Grep #Find #Globstar #Catenate #TextFiles

Of bits and bytes
https://yesik.it/blog/2018-bit-nibble-byte-and-word

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

About the Execute Bit
https://yesik.it/blog/2018-the-x-permission-bit

#Linux #Permissions #Chmod

`curl` is the swiss army knife for querying remote services using the #FTP, #FTPS, #HTTP, #HTTPS, #IMAP, #LDAP, #POP3, #SMTP or #TFTP protocol (and many more!)

Here is a tutorial by Himanshu Arora showing 5 basic #curl examples:
https://www.howtoforge.com/linux-curl-command/

#linux #unix #cli

`chmod +x` will make a file executable. If you ever have written a shell script on Unix/Linux, you know that. But what does that `x` means for a directory?

https://yesik.it/blog/2018-the-x-permission-bit
#Linux #Unix #chmod

10 Ways of Launching Commands from your Shell
using:
; & && | and ||

https://www.yesik.it/SHELL10
#Shell #Command #Background #Multitask

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

Stop now the vi .vs. emacs war.

Ed is THE standard editor. And it is since unmemorable times.

https://www.gnu.org/fun/jokes/ed-msg.html
#Ed #Standard #Unix #TextEditor

What happens if you change a shell script, whilst it is running?
https://www.shellscript.sh/tips/change-running-script/

by Steve Parker (https://twitter.com/unixsteve)
#Shell #SelfModifying #Script

If 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

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

The Executable and Linkable Format (ELF), is a standard file format for executable files used on many Unix-like x86 operating systems.

Part.1 https://blog.k3170makan.com/2018/09/introduction-to-elf-format-elf-header.html by Keith Makan (https://twitter.com/k3170Makan)
#elf #linux

Understanding symbolic and hard links:

https://linuxtechlab.com/working-with-linux-file-links/
#Linux #Unix #File #Link

You basically have three strategies to tune the Linux Kernel vm.dirty* settings:
1. Decrease the cache (low dirty_ratio)
2. Increase the cache (high dirty_background_ratio)
3. Increase the spread (dirty_background_ratio and high dirty_ratio)

https://lonesysadmin.net/2013/12/22/better-linux-disk-caching-performance-vm-dirty_ratio/
#Linux #Kernel #Tuning #Disk

An instructive article if you need to fine-tune your system or if you want to know more about the process management capabilities of Linux.

https://likegeeks.com/linux-process-management/
#Linux #Process #Management

The chart is barely readable at that scale, but go to Deviant Art to download hires version of that amazing work by Sonic840

https://www.deviantart.com/sonic840/art/Computer-Hardware-Chart-2-0-587798335 http://www.sonic84.com/Home/Welcome.html #Computer #Hardware #Connector

Test Your GitHub Repositories with Docker in 5 Minutes

https://developer.okta.com/blog/2018/09/27/test-your-github-repositories-with-docker-in-five-minutes
#Docker #Git #GitHub #Deployment

I'm not into gaming, but apparently, Linux is gaining shares on that market too.

I'm not sure though if it is about games developed for Linux. Or about running Windows games on Linux.
https://www.youtube.com/watch?v=IWJUphbYnpg

#Linux #Gaming

I'm a regular used of `hexdump` to view an hexadecimal dump of a file.
But I wasn't aware of the `hexcurse` hexadecimal *editor*.

https://www.maketecheasier.com/using-hex-editor-linux
#hexcurse #ghex #hexadecimal #editor #linux

Another excellent cheatsheet by Jeremy Stretch:

http://packetlife.net/media/library/6/IPsec.pdf
Follow him on Twitter (https://twitter.com/packetlife/) and check his website for more (http://packetlife.net/)
#IPSec #IP #Network #Security #Layer #Cheatsheet

If your work is even slightly network-related, you should know how to use Wireshark .

Take a look at that tutorial to learn more:
https://www.howtogeek.com/107945/how-to-identify-network-abuse-with-wireshark/
by Chris Hoffman (https://twitter.com/chrisbhoffman)
#Wireshark #Network #Scanning