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r/linux
423k  subs
All things Linux and GNU/Linux -- this is neither a community exclusively about the kernel Linux, nor is exclusively about the GNU operating system.
https://reddit.com/r/linux/
r/netsec
327k  subs
A community for technical news and discussion of information security and closely related topics.
https://reddit.com/r/netsec/
r/trackers
118k  subs
A subreddit for discussing public & private trackers.
https://reddit.com/r/trackers/
r/commandline
46k  subs
This is for anything regarding the command line, in any operating system. All questions (including dumb ones), tips, and interesting programs/console applications you've found or made yourself are welcome. Linux / BSD / OSX / Windows CLI apps or questions or comments, we're happy to take them all!
https://reddit.com/r/commandline/
r/unixporn
182k  subs
Submit screenshots of all your *NIX desktops, themes, and nifty configurations, or submit anything else that will make ricers happy. Maybe a server running on an Amiga, or a thinkpad signed by Bjarne Stroustrup? Show the world how sexy your computer can be!
https://reddit.com/r/unixporn/
r/archlinux
100k  subs
For users of the much loved Linux distro, Arch Linux.
https://reddit.com/r/archlinux/
r/sysadmin
374k  subs
A reddit dedicated to the profession of Computer System Administration.
https://reddit.com/r/sysadmin/
r/vim
87k  subs
For Vim enthusiasts and anyone interested in Vim.
https://reddit.com/r/vim/
r/Ubuntu
124k  subs
The Ubuntu community on Reddit
https://reddit.com/r/Ubuntu/
r/torrents
122k  subs
But you wouldn't download a new Director of Talent
https://reddit.com/r/torrents/
r/linux4noobs
133k  subs
Linux introductions, tips and tutorials. Questions are encouraged. Any distro, any platform! Explicitly noob-friendly.
https://reddit.com/r/linux4noobs/
Welcome to **Tales From Tech Support**, where we share our stories of: * *Incredible Feats* of Networking Heroics; * *Tech Troubleshooting* Under the Direst Circumstances; * *Unsolvable Problems* Cracked by Sheer Genius and/or Pure Luck; * *Moral Support* after Having Dealt with Difficult Clients; * And of course, **Stupid User Stories!** We've got a bit of a lull in the queue just now, so kick back, grab a cold one, and share your best tales among friends here at TFTS!
https://reddit.com/r/talesfromtechsupport/
r/TOR
79k  subs
News and discussion about the Tor anonymity software. New to Tor? Please read the Tor FAQ!
https://reddit.com/r/TOR/
r/linuxadmin
134k  subs
Expanding Linux SysAdmin knowledge
https://reddit.com/r/linuxadmin/
r/linux_gaming
110k  subs
A subreddit for gaming on the GNU/Linux operating system.
https://reddit.com/r/linux_gaming/
r/networking
182k  subs
###Enterprise Networking Routers, switches and firewalls. Network blogs, news and network management articles. Cisco, Juniper, Brocade and more all welcome.
https://reddit.com/r/networking/
r/opensource
89k  subs
A subreddit for everything [open source](http://en.wikipedia.org/wiki/Open_source) related.
https://reddit.com/r/opensource/
r/seedboxes
29k  subs
A place to discuss seedboxes and everything related to them.
https://reddit.com/r/seedboxes/
r/usenet
54k  subs
We are a thriving community dedicated to helping users old and new understand and use usenet.
https://reddit.com/r/usenet/
r/reddit.com
818k  subs
The original subreddit, now archived.
https://reddit.com/r/reddit.com/
r/hacking
826k  subs
A subreddit dedicated to hacking and hackers. Constructive collaboration and learning about exploits, industry standards, grey and white hat hacking, new hardware and software hacking technology, sharing ideas and suggestions for small business and personal security.
https://reddit.com/r/hacking/
r/onions
145k  subs
The Best Parts of the Anonymous Internet | Tor Onion Routing Hidden Services | .onions
https://reddit.com/r/onions/
r/webdev
376k  subs
A community dedicated to all things web development: both front-end and back-end. For more design-related questions, try /r/web_design.
https://reddit.com/r/webdev/
A subreddit for Linux enthusiasts.
https://reddit.com/r/linuxmasterrace/