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Updated: 42 min 16 sec ago

What are good beginner friendly resources and tips for learning about cyber security and networking?

3 hours 13 min ago

I want to expand my knowledge of those topics. I am thinking of making a career out of cyber security but for now this is just for expanding my knowledge.

A little background on my I.T skills: I've been using Linux for about 3 years now and absolutely love the platform, love to tinker with it and love to troubleshoot issues. I have used several distros including Ubuntu, Fedora, Antergos, Manjaro, Deepin, Elementary OS and a few others. I am currently triple booting Remix OS, Windows 8.1 and Ubuntu 16.04 LTS. I did some beginner level python, Java, C and C++. Currently learning JavaScript, HTML and CSS for full stack web development(as a hobby). I am still very much a beginner and don't consider myself a programmer yet. Android is my mobile OS of choice and I have flashed custom recovery and custom ROMs. I am currently using CM13 on my Nexus 6. Most of the content I read on the internet is tech news related stuff.

Two big things I want to get around to doing would be to install Arch and compiling my own kernel.

Not trying to humble brag(there is nothing in my skills set to brag about). I just wanted to give you guys an idea of where I am at in terms of my I.T. "skills" so that you can make good recommendations for resources that someone on my level could understand. I want to learn more about tor, encryption, network security, setting up my own servers, etc. Any tips?

Thanks in advance and sorry for the typos.

submitted by /u/Groudie
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4 hours 59 min ago

Just did sudo rm --no-preserve-root -r / on Ubuntu 16.04 in Virtualbox. What happened?

Wed, 2016-08-31 20:35

So, I was messing around with Ubuntu and did sudo rm -r /. All on tty1 in full text mode only.

At first it showed a message saying that doing such recursive things on root was dangerous. So I did sudo rm --no-preserve-root -r /. At first messages flied through saying things did not have permission. Then it stopped in between with heavy disk activity - presumably deleting shit. Finally it stopped at something cannot be deleted because resource was busy.

Naturally I pressed Tab twice to see what commands are left. Not too much. Good. :)

Then I tried running the same command again. And it shows /usr/bin/sudo: No such file or directory stating that sudo has been deleted from the system.

At this point I want to ask 5 things:

  1. What all is left behind in the system?

  2. Why did I get permission denied messages when I am running them as the (virtual) superuser?

  3. What super important things have been deleted that severely affects even a barebones system?

  4. What all can I do with the leftover system?

  5. Can I get it back to a normal working system? If so, how? (Since I am behind proxy, bonus internet points for telling how to do that behind proxy.)

submitted by /u/linuxode
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What are some things you are almost embarrassed to admit you discovered really late but can't do without now?

Wed, 2016-08-31 19:55

I was just reminded of my example of this and had to laugh. Was wondering if anyone else has similar things. Mine is screen. I'm a terminal junky. I do almost everything in a text terminal and typically have at least 10-15 terminal windows with 5-10 tabs each. I even read my email in a text terminal using mutt. I'm embarrassed to say that it only took me about 13 years of using Unix/BSD/Linux to discover screen.

Just curious if anyone else has had the same thing and maybe learn a few new tricks.

submitted by /u/ralfwolf
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EOMA68 an interview

Wed, 2016-08-31 18:16

Kali Linux 2016.2 release

Wed, 2016-08-31 17:48

Keeping music synced between linux and android?

Wed, 2016-08-31 17:29

What is the best way to keep music synced? I wan t to be able to delete and add music locally and have that change on my phone. Right now I'm removing everything and re-transferring but that takes ages.

Any suggestions?

submitted by /u/davegri
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netstat not showing port listening?

Wed, 2016-08-31 14:48

Why is netstat not showing that a process is listening on port 80 in ipv4, while lsof clear shows it:


# lsof -P -i:80 COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME httpd 764 root 4u IPv6 20562 0t0 TCP *:80 (LISTEN) httpd 796 apache 4u IPv6 20562 0t0 TCP *:80 (LISTEN) httpd 817 apache 4u IPv6 20562 0t0 TCP *:80 (LISTEN) httpd 1943 apache 4u IPv6 20562 0t0 TCP *:80 (LISTEN) httpd 2124 apache 4u IPv6 20562 0t0 TCP *:80 (LISTEN) httpd 2229 apache 4u IPv6 20562 0t0 TCP *:80 (LISTEN) httpd 2272 apache 4u IPv6 20562 0t0 TCP *:80 (LISTEN) httpd 2300 apache 4u IPv6 20562 0t0 TCP *:80 (LISTEN) httpd 2315 apache 4u IPv6 20562 0t0 TCP *:80 (LISTEN) httpd 2682 apache 4u IPv6 20562 0t0 TCP *:80 (LISTEN) httpd 2685 apache 4u IPv6 20562 0t0 TCP *:80 (LISTEN)


# netstat -tln Active Internet connections (only servers) Proto Recv-Q Send-Q Local Address Foreign Address State tcp 0 0* LISTEN tcp 0 0* LISTEN tcp 0 0* LISTEN tcp 0 0* LISTEN tcp 0 0* LISTEN tcp 0 0* LISTEN tcp 0 0* LISTEN tcp 0 0* LISTEN tcp 0 0* LISTEN tcp 0 0* LISTEN tcp6 0 0 :::2222 :::* LISTEN tcp6 0 0 :::111 :::* LISTEN tcp6 0 0 :::80 :::* LISTEN tcp6 0 0 :::662 :::* LISTEN tcp6 0 0 :::22 :::* LISTEN tcp6 0 0 :::5432 :::* LISTEN tcp6 0 0 :::443 :::* LISTEN tcp6 0 0 :::892 :::* LISTEN tcp6 0 0 :::* LISTEN tcp6 0 0 :::2049 :::* LISTEN tcp6 0 0 :::* LISTEN tcp6 0 0 :::9090 :::* LISTEN tcp6 0 0 :::32803 :::* LISTEN submitted by /u/dorfsmay
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