If you're looking to use OBS on Linux, I'd strongly recommend Ubuntu Studio:
ubuntustudio.org
It has OBS preinstalled, along with a TON of other media-related things.
Follow the instructions there, or for other *buntu distributions (some have better instructions than others, and they all work for each other if you can translate a different-styled screenshot into what you have), then once you have it running, you'll want to start with some basic maintenance.
Before you dive into anything, you'll of course want to fully-update the new system, as what you downloaded is only as up-to-date as when it was published. Put this in a script, right-click the file and make it executable, and run it as
sudo <script-name>
:
Bash:
#!/bin/bash
apt update
apt full-upgrade -y
apt autoremove -y
snap refresh
Continue to run that script periodically, when you have some time to troubleshoot what might have changed. That troubleshooting is a lot better than getting hacked! I want to control when that happens, so in my exploring all the settings, I turned the auto-update completely off. But I do run that script fairly often.
Let that finish, then reboot, then add OBS's official PPA as described here:
The Linux version of OBS is still under development and contains many bugs, but if you're feeling brave, and can install Ubuntu PPAs, then you can give this a try. If you're on Ubuntu 14.04 LTS, you'll first need to install FFmpeg: sudo apt-add-repository ppa:kirillshkrogalev/ffmpeg-next sudo...
obsproject.com
Run the update script again, and reboot again.
NOW, you can start playing with OBS on Linux. :-)