* Replace homepage with GitHub repository link
problem-sets-competitive-programming.md: Replace homepage
link of problembook with github repository link which contains
downloadable pdf links.
* Remove broken links
Remove broken links and update available links from
web.archive.org.
* Update broken link with updated link.
Update the description for the updated link.
* Update broken links with links from web.archive.org
Remove dead links.
* Restore path to original link instead of web.archive.org
The link seems to be working fine. It was not loading
on my network, probably due to regional restrictions.
* Remove github link which is no longer maintained.
Github link consisted of list of Big Data resources.
The repository has been deleted by the user.
Hence deleting the entry.
* [Bases de la programación en Bash](http://xinfo.sourceforge.net/documentos/bash-scripting/bash-script-2.0.html)
* [Bases de la programación en Bash](http://xinfo.sourceforge.net/documentos/bash-scripting/bash-script-2.0.html)
* [BASH Scripting Avanzado: Utilizando declare para definición de tipo](http://library.originalhacker.org/biblioteca/articulo/ver/123)
* [BASH Scripting Avanzado: Utilizando declare para definición de tipo](https://web.archive.org/web/20150307181233/http://library.originalhacker.org:80/biblioteca/articulo/ver/123)
* [Debian GNU/Linux para administradores](https://debian-handbook.info/browse/es-ES/stable/)
* [Debian GNU/Linux para administradores](https://debian-handbook.info/browse/es-ES/stable/)
* [El Manual de BASH Scripting Básico para Principiantes](https://es.wikibooks.org/wiki/El_Manual_de_BASH_Scripting_B%C3%A1sico_para_Principiantes) en WikiBooks
* [El Manual de BASH Scripting Básico para Principiantes](https://es.wikibooks.org/wiki/El_Manual_de_BASH_Scripting_B%C3%A1sico_para_Principiantes) en WikiBooks
* [iOS OpenGL ES プログラミングガイド](https://developer.apple.com/jp/devcenter/ios/library/documentation/OpenGLES_ProgrammingGuide.pdf) - Apple Developer (PDF)
* [iOS OpenGL ES プログラミングガイド](https://developer.apple.com/jp/documentation/3DDrawing/Conceptual/OpenGLES_ProgrammingGuide/Introduction/Introduction.html) - Apple Developer (HTML)
* [Software optimization resources](http://www.agner.org/optimize/) A. Fog
* [Software optimization resources](http://www.agner.org/optimize/) A. Fog
@ -1153,7 +1153,7 @@
* [Learn Git - Learn Version Control with Git](http://www.git-tower.com/learn/git/ebook/command-line/introduction) - Tobias Günther
* [Learn Git - Learn Version Control with Git](http://www.git-tower.com/learn/git/ebook/command-line/introduction) - Tobias Günther
* [Pro Git](http://git-scm.com/book/en/v2) - Scott Chacon
* [Pro Git](http://git-scm.com/book/en/v2) - Scott Chacon
* [Pro Git Reedited](https://leanpub.com/progitreedited) - Jon Forrest
* [Pro Git Reedited](https://leanpub.com/progitreedited) - Jon Forrest
* [Ry's Git Tutorial](http://rypress.com/tutorials/git) - Ryan Hodson
* [Ry's Git Tutorial](https://web.archive.org/web/20161121145226/http://rypress.com:80/tutorials/git/index) - Ryan Hodson
* [Think Like (a) Git: A Guide for the Perplexed](http://think-like-a-git.net)
* [Think Like (a) Git: A Guide for the Perplexed](http://think-like-a-git.net)
* [Version Control by Example (Mercurial, Subversion, Verasity)](http://ericsink.com/vcbe/)
* [Version Control by Example (Mercurial, Subversion, Verasity)](http://ericsink.com/vcbe/)
@ -1368,7 +1368,7 @@
#### Spring
#### Spring
* [Spring Framework Reference Documentation](http://docs.spring.io/spring/docs/current/spring-framework-reference/html/) - Rod Johnson, Juergen Hoeller, Keith Donald, Colin Sampaleanu, Rob Harrop, Thomas Risberg, Alef Arendsen, Darren Davison, Dmitriy Kopylenko, Mark Pollack, Thierry Templier, Erwin Vervaet, Portia Tung, Ben Hale, Adrian Colyer, John Lewis, Costin Leau, Mark Fisher, Sam Brannen, Ramnivas Laddad, Arjen Poutsma, Chris Beams, Tareq Abedrabbo, Andy Clement, Dave Syer, Oliver Gierke, Rossen Stoyanchev, Phillip Webb, Rob Winch, Brian Clozel, Stephane Nicoll, Sebastien Deleuze ([PDF](http://docs.spring.io/spring/docs/current/spring-framework-reference/pdf/spring-framework-reference.pdf))
* [Spring Framework Reference Documentation](http://docs.spring.io/spring/docs/current/spring-framework-reference/html/) - Rod Johnson, Juergen Hoeller, Keith Donald, Colin Sampaleanu, Rob Harrop, Thomas Risberg, Alef Arendsen, Darren Davison, Dmitriy Kopylenko, Mark Pollack, Thierry Templier, Erwin Vervaet, Portia Tung, Ben Hale, Adrian Colyer, John Lewis, Costin Leau, Mark Fisher, Sam Brannen, Ramnivas Laddad, Arjen Poutsma, Chris Beams, Tareq Abedrabbo, Andy Clement, Dave Syer, Oliver Gierke, Rossen Stoyanchev, Phillip Webb, Rob Winch, Brian Clozel, Stephane Nicoll, Sebastien Deleuze ([PDF](https://docs.spring.io/spring/docs/current/spring-framework-reference/pdf/index.pdf))
#### Spring Boot
#### Spring Boot
@ -1990,7 +1990,7 @@ For resources on Angular, Backbone, D3, Dojo, Ember, Express, jQuery, Knockout,
* [An Introduction to Statistical Learning with Applications in R](http://www-bcf.usc.edu/~gareth/ISL/) - Gareth James, Daniela Witten, Trevor Hastie and Robert Tibshirani (PDF)
* [An Introduction to Statistical Learning with Applications in R](http://www-bcf.usc.edu/~gareth/ISL/) - Gareth James, Daniela Witten, Trevor Hastie and Robert Tibshirani (PDF)
* [Cookbook for R](http://www.cookbook-r.com) - Winston Chang
* [Cookbook for R](http://www.cookbook-r.com) - Winston Chang
* [Introduction to Probability and Statistics Using R](http://cran.r-project.org/web/packages/IPSUR/vignettes/IPSUR.pdf) - G. Jay Kerns (PDF)
* [Introduction to Probability and Statistics Using R](http://cran.r-project.org/web/packages/IPSUR/vignettes/IPSUR.pdf) - G. Jay Kerns (PDF)
* [Learning Statistics with R](http://health.adelaide.edu.au/psychology/ccs/teaching/lsr) - Daniel Navarro
* [Learning Statistics with R](https://web.archive.org/web/20170625184412/http://health.adelaide.edu.au/psychology/ccs/teaching/lsr/) - Daniel Navarro
* [Machine Learning with R](https://www.packtpub.com/packt/free-ebook/r-machine-learning) - Brett Lantz, Packt. *(Just fill the fields with any values)*
* [Machine Learning with R](https://www.packtpub.com/packt/free-ebook/r-machine-learning) - Brett Lantz, Packt. *(Just fill the fields with any values)*
* [ModernDive](https://ismayc.github.io/moderndiver-book/) - Chester Ismay and Albert Y. Kim
* [ModernDive](https://ismayc.github.io/moderndiver-book/) - Chester Ismay and Albert Y. Kim
* [Practical Regression and Anova using R](http://cran.r-project.org/doc/contrib/Faraway-PRA.pdf) - Julian J. Faraway (PDF)
* [Practical Regression and Anova using R](http://cran.r-project.org/doc/contrib/Faraway-PRA.pdf) - Julian J. Faraway (PDF)