* docs: arrange course list

* docs: add go course

* fix: order course list according to lint

* fix: rearrange hierarchical structure

* Update free-programming-interactive-tutorials-en.md

* Update free-programming-interactive-tutorials-en.md

* Fix linting errors

* Fix linting errors

* Update more/free-programming-interactive-tutorials-en.md
Co-authored-by: NDavid Ordás <3125580+davorpa@users.noreply.github.com>

* Update free-programming-interactive-tutorials-en.md

Add another resource and rename the section

* Update free-programming-interactive-tutorials-en.md
Co-authored-by: NDavid Ordás <3125580+davorpa@users.noreply.github.com>

* Added Blockchain resources to free-courses-en

Added Blockchain resources to free-courses-en

* Update free-courses-en.md

* Added Blockchain resources to free-courses-en

Made changes to the resource(s) about Blockchain in free-courses-en.md

* New changes made to Blockchain resources

added the cryptozombies link which i previously deleted by mistake
changes the Playlist text to YouTube Playlist

* Update courses/free-courses-en.md
Co-authored-by: NDavid Ordás <3125580+davorpa@users.noreply.github.com>

* Update courses/free-courses-en.md
Co-authored-by: NDavid Ordás <3125580+davorpa@users.noreply.github.com>

* Update courses/free-courses-en.md
Co-authored-by: NDavid Ordás <3125580+davorpa@users.noreply.github.com>

* add creator
Co-authored-by: NDavid Ordás <3125580+davorpa@users.noreply.github.com>
Co-authored-by: NEric Hellman <eric@hellman.net>
Co-authored-by: NDavid Ordás <3125580+davorpa@users.noreply.github.com>

* add to documentation

* Added RPi cheatsheets

* Update free-programming-cheatsheets.md

* Update free-programming-cheatsheets.md

* Update free-programming-cheatsheets.md

* Update free-programming-cheatsheets.md

* Update free-programming-cheatsheets.md

fixed 404 broken link issue

* Update free-programming-cheatsheets.md

* Update CONTRIBUTING.md

* Added Blockchain books -PDF

* Delete free-programming-books-langs.md

* Re-added books

* Additional changes, mods.

* Update free-programming-books-langs.md

* Modifications contrib.

* Update CONTRIBUTING.md

* Update CONTRIBUTING.md

* Additions for Tensorflow cheatsheets (other branch)

* Update free-programming-cheatsheets.md

* Changes on other files

* Update free-programming-cheatsheets.md

* Additional changes

* Final changes for cheatsheets page nl ends.

* Update free-programming-cheatsheets.md

added the official content from kaggle for TF (includes pdf link, html only)
removed the blog TF link at the top (as per contributing.md guidelines)

* Update free-programming-books-langs.md

About: Blockchain additions, removed all the whitepapers from the list.

Why is the "Introducting Eth*" allowed in the PDF list of ebooks and the "*for dummies" series  not allowed? I do not see that rule in the contributing.md file
AFAIK, both are online ebooks links, both with an ISBN/Table Of Contents for chapters.

Either way, i replaced the first one with one that is free from offic. ibm public link

* delete patch

* Remove patch. not free
Co-authored-by: NDavid Ordás <3125580+davorpa@users.noreply.github.com>

* use wayback machine to provide its backed PDF link
Co-authored-by: NDavid Ordás <3125580+davorpa@users.noreply.github.com>

* add in process, creator
Co-authored-by: NDavid Ordás <3125580+davorpa@users.noreply.github.com>

* blockchain is not a language. the dummies book should be is subjects list
Co-authored-by: Neric <eric@hellman.net>
Co-authored-by: NDavid Ordás <3125580+davorpa@users.noreply.github.com>

* Added: Free courses and Resource in khmer language.

Added: Free courses and Resource in khmer language.

* Fixed: linter error.

Fixed: linter error.

* Fixed: build error

* Added: khmer language  course to readme. 

Added: khmer language  course to readme.

* Changed: khmer iso code from kh to km

* changed: khmer iso code from kh to km

* Changed content and fix links.

Removed non khmer courses, changed link youtube, and  fix Alphabetized order

* fixed: order alphatically

* fixed: title and content error.

* removed: non khmer courses.

* Add udacity course Offline Web Applications

* Move entry to correct position

* Add author info
Co-authored-by: NDavid Ordás <3125580+davorpa@users.noreply.github.com>
Co-authored-by: NDavid Ordás <3125580+davorpa@users.noreply.github.com>

* add : Flutter books (HTML) Bahasa Indonesia

* fix : writing format

* add a korean book links

* lint checked warning point fix

* lint checked warning point fix

* TOC fix

* TOC fix

* TOC fix

* add a python guide

* Alphabetical fix

* Update books/free-programming-books-ko.md
Co-authored-by: NDavid Ordás <3125580+davorpa@users.noreply.github.com>

* empty index remove

* add a new ebook "intermediate python"

* add a AWS Script ebook link

* add a sed stream editor ebook
Co-authored-by: Nhedykim <mzchedykim@lgupluspartners.co.kr>
Co-authored-by: NDavid Ordás <3125580+davorpa@users.noreply.github.com>

* remove online course from "books"

* add french C course in the more appropriate section
Co-authored-by: Nx0rld <git@x0rld.eu>

* Added: khmer language to HOWTO page.

Added: khmer language to HOWTO page.

* Changed: khmer iso code from kh to km

* Added Distributed Systems and Bash Shell Scripting in english

* Added Distributed Systems tutorial

* Fixes: #6178

* Upate Julia Quantitative Economics link to be more stable

* Slovenian language introduced

* Additional changes on Slovenian language

* add devMode podcast

* change devMode.fm podcast link

* add jadi apple podcast

* change radio geek url into anchor.fm

* new persian python free course added

* new farsi python course added

* Update courses/free-courses-fa_IR.md
Co-authored-by: NDavid Ordás <3125580+davorpa@users.noreply.github.com>

* added new farsi course(.idea removed)

* added new farsi python course with access note

* added new farsi python course with access note
Co-authored-by: NDavid Ordás <3125580+davorpa@users.noreply.github.com>

* Added book: Foundations of Computational Books

* Update free-programming-books-subjects.md

* Create free-courses-gr.md and added JavaScript course

check_urls=free-programming-books.md free-programming-books-gr.md

* Update free-courses-gr.md

* Bumps review EbookFoundation#5693

Recover deleted PR head:
git fetch upstream pull/5693/head:pr/anneiric/5693

anneiric <69729163+anneiric@users.noreply.github.com>

* fix(listings): greek language code `gr` > `el`

language code for greek is `el` not `gr`. See: EbookFoundation/free-programming-books#6070

Applies https://github.com/EbookFoundation/free-programming-books/pull/5693#issuecomment-938647297

* feat(courses): Add greek entry

Link recent created greek courses listing `books/free-courses-el.md` into `README.md`

Resolves EbookFoundation/free-programming-books#5693

* feat(courses): Add greek entry

Link `courses/free-courses-el.md` into `README.md`

Resolves EbookFoundation/free-programming-books#5693
Co-authored-by: Nanneiric <69729163+anneiric@users.noreply.github.com>

* Include Textbook for System Programming in C at the University of Illinois

* Correct book title and add authors

* kentc podcast

* change with kent's site

* Add RxJS course "Asynchronous Programming: The End of The Loop"

* remove link to author's social

* remove egghead.io site link
Co-authored-by: NEric Hellman <eric@hellman.net>

* Update free-courses-en.md

* remove subcategory for cycle js

* Removing 404 link Errors from ES

404 Errors 
http://lya.fciencias.unam.mx/jloa/publicaciones/introduccionJava.pdf
http://lya.fciencias.unam.mx/jloa/publicaciones/teoria.pdf
http://lya.fciencias.unam.mx/jloa/publicaciones/automatasyLenguajes.pdf

* Updating https:// links for fciencias.unam.mx 

Removing one link

* add missing blank line

* add missing blank line

* adding POO y MVC en PHP - Eugenia Bahit (PDF)

* Update books/free-programming-books-es.md
Co-authored-by: NDavid Ordás <3125580+davorpa@users.noreply.github.com>
Co-authored-by: NDavid Ordás <3125580+davorpa@users.noreply.github.com>

* Added CMake courses

* fixed alphabetical order build error

* fixed build error (I hope)

* removed riptutorials

* Fix links for english casts

* Removing trailing slash

* add book Mastering Node

* update entry for Mastering Node

Moved 
[Solidity Tutorial - A Full Course on Ethereum, Blockchain Development, Smart Contracts, and the EVM](https://www.youtube.com/watch?v=ipwxYa-F1uY) - Gregory McCubbin @ freeCodeCamp.org & Dapp University (YouTube)
to courses from tutorials,
Thanks :)

* Update free-programming-books-subjects.md

* Update free-programming-books-langs.md

* Update free-programming-books-subjects.md

* Update free-programming-books-subjects.md

* Update free-programming-books-subjects.md

* Update books/free-programming-books-langs.md
Co-authored-by: NDavid Ordás <3125580+davorpa@users.noreply.github.com>

* Update books/free-programming-books-subjects.md
Co-authored-by: NDavid Ordás <3125580+davorpa@users.noreply.github.com>

* Update books/free-programming-books-subjects.md
Co-authored-by: NDavid Ordás <3125580+davorpa@users.noreply.github.com>

* Update books/free-programming-books-subjects.md
Co-authored-by: NDavid Ordás <3125580+davorpa@users.noreply.github.com>

* Update free-programming-books-subjects.md

* Update free-programming-books-subjects.md

* Update free-programming-books-subjects.md

* Update free-programming-books-subjects.md

* Update free-programming-books-subjects.md
Co-authored-by: NDavid Ordás <3125580+davorpa@users.noreply.github.com>

* added python course

* Update courses/free-courses-tr.md
Co-authored-by: NDavid Ordás <3125580+davorpa@users.noreply.github.com>
Co-authored-by: NDavid Ordás <3125580+davorpa@users.noreply.github.com>

Moving course to javascript section

* Hindi topicwise playlists of algorithms added, Hindi topicwise playlists of data-structures added

* Update free-courses-hi.md

* changed title of C++

* Update free-courses-hi.md

* space removed, original titles added

* Update free-courses-hi.md
Co-authored-by: NEric Hellman <eric@hellman.net>

I added "Search Engines: Information Retrieval in Practice" by W. Bruce Croft, Donald Metzler, Trevor Strohman to the subject list.