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Blogs/Podcasts/Videos

SysOps/DevOps​

Varnish for PHP developers - very interesting presentation of Varnish by Mattias Geniar.
A Netflix Guide to Microservices - talks about the chaotic and vibrant world of microservices at Netflix.

Developers​

Comparing C to machine lang - compare a simple C app with the compiled machine code of that program.

Geeky Persons​

Brendan Gregg's Blog - is an industry expert in computing performance and cloud computing.
Gynvael "GynDream" Coldwind - is a IT security engineer at Google.
Michał "lcamtuf" Zalewski - white hat hacker, computer security expert.
Mattias Geniar - developer, sysadmin, blogger, podcaster and public speaker.
Nick Craver - software developer and systems administrator for Stack Exchange.
Scott Helme - security researcher, speaker and founder of securityheaders.com and report-uri.com.
Brian Krebs - The Washington Post and now an Independent investigative journalist.
Bruce Schneier - is an internationally renowned security technologist, called a "security guru".
Chrissy Morgan - advocate of practical learning, Chrissy also takes part in bug bounty programs.
Andy Gill - is a hacker at heart who works as a senior penetration tester.
Daniel Miessler - cybersecurity expert and writer.
Samy Kamkar - is an American privacy and security researcher, computer hacker.
Javvad Malik - is a security advocate at AlienVault, a blogger event speaker and industry commentator.
Graham Cluley - public speaker and independent computer security analyst.
Kacper Szurek - detection engineer at ESET.
Troy Hunt - web security expert known for public education and outreach on security topics.
raymii.org - sysadmin specializing in building high availability cloud environments.
Robert Penz - IT security expert.

Geeky Blogs​

Linux Audit - the Linux security blog about auditing, hardening and compliance by Michael Boelen.
Linux Security Expert - trainings, howtos, checklists, security tools, and more.
The Grymoire - collection of useful incantations for wizards, be you computer wizards, magicians, or whatever.
Secjuice - is the only non-profit, independent and volunteer led publication in the information security space.
Decipher - security news that informs and inspires.

Geeky Vendor Blogs​

Tenable Podcast - conversations and interviews related to Cyber Exposure, and more.
Sophos - threat news room, giving you news, opinion, advice and research on computer security issues.
Tripwire State of Security - blog featuring the latest news, trends and insights on current security issues.
Malwarebytes Labs Blog - security blog aims to provide insider news about cybersecurity.
TrustedSec - latest news, and trends about cybersecurity.
PortSwigger Web Security Blog - about web app security vulns and top tips from our team of web security.
AT&T Cybersecurity blog - news on emerging threats and practical advice to simplify threat detection.
Thycotic - where CISOs and IT Admins come to learn about industry trends, IT security, and more.

Geeky Cybersecurity Podcasts​

Risky Business - is a weekly information security podcast featuring news and in-depth interviews.
Cyber, by Motherboard - stories, and focus on the ideas about cybersecurity.
Tenable Podcast - conversations and interviews related to Cyber Exposure, and more.
Cybercrime Investigations - podcast by Geoff White about cybercrimes.
The many hats club - featuring stories from a wide range of Infosec people (Whitehat, Greyhat and Blackhat).
Darknet Diaries - true stories from the dark side of the Internet.
OSINTCurious Webcasts - is the investigative curiosity that helps people be successful in OSINT.
Security Weekly - the latest information security and hacking news.

Geeky Cybersecurity Video Blogs​

rev3rse security - offensive, binary exploitation, web app security, hardening, red team, blue team.
LiveOverflow - a lot more advanced topics than what is typically offered in paid online courses - but for free.
J4vv4D - the important information regarding our internet security.
CyberTalks - talks, interviews, and article about cybersecurity.

Best Personal Twitter Accounts​

@blackroomsec - a white-hat hacker/pentester. Intergalactic Minesweeper Champion 1990.
@MarcoCiappelli - Co-Founder @ITSPmagazine, at the intersection of IT security and society.
@binitamshah - Linux Evangelist. Malwares. Kernel Dev. Security Enthusiast.
@joe_carson - an InfoSec Professional and Tech Geek.
@mikko - CRO at F-Secure, Reverse Engineer, TED Speaker, Supervillain.
@esrtweet - often referred to as ESR, is an American software developer, and open-source software advocate.
@gynvael - security researcher/programmer, @DragonSectorCTF founder/player, technical streamer.
@x0rz - Security Researcher & Cyber Observer.
@hasherezade - programmer, malware analyst. Author of PEbear, PEsieve, libPeConv.
@TinkerSec - tinkerer, cypherpunk, hacker.
@alisaesage - independent hacker and researcher.
@SwiftOnSecurity - systems security, industrial safety, sysadmin, author of decentsecurity.com.
@dakami - is one of just seven people with the authority to restore the DNS root keys.
@samykamkar - is a famous "grey hat" hacker, security researcher, creator of the MySpace "Samy" worm.
@securityweekly - founder & CTO of Security Weekly podcast network.
@jack_daniel - @SecurityBSides co-founder.
@thegrugq - Security Researcher.
@matthew_d_green - a cryptographer and professor at Johns Hopkins University.

Best Commercial Twitter Accounts​

@haveibeenpwned - check if you have an account that has been compromised in a data breach.
@bugcrowd - trusted by more of the Fortune 500 than any other crowdsourced security platform.
@Malwarebytes - most trusted security company. Unmatched threat visibility.
@sansforensics - the world's leading Digital Forensics and Incident Response provider.
@attcyber - AT&T Cybersecurity’s Edge-to-Edge technologies provide threat intelligence, and more.
@TheManyHatsClub - an information security focused podcast and group of individuals from all walks of life.
@hedgehogsec - Hedgehog Cyber. Gibraltar and Manchester's top boutique information security firm.
@NCSC - the National Cyber Security Centre. Helping to make the UK the safest place to live and work online.
@Synacktiv - IT security experts.

A piece of history​

How to Do Things at ARL - how to configure modems, scan images, record CD-ROMs, and other.*

Other​

Diffie-Hellman Key Exchange (short version) - how Diffie-Hellman Key Exchange worked.