Increase ubuntu swap

 root@obs-server:/home/obs# swapoff /swap.img

root@obs-server:/home/obs# rm /swap.img

root@obs-server:/home/obs# sudo dd if=/dev/zero of=/swap.img bs=1M count=16384

16384+0 records in

16384+0 records out

17179869184 bytes (17 GB, 16 GiB) copied, 106.527 s, 161 MB/s

root@obs-server:/home/obs# mkswap /swap.img

mkswap: /swap.img: insecure permissions 0644, 0600 suggested.

Setting up swapspace version 1, size = 16 GiB (17179865088 bytes)

no label, UUID=0ebd4780-f6ff-4f33-89f6-5defa0c59484

root@obs-server:/home/obs# swapon  /swap.img

swapon: /swap.img: insecure permissions 0644, 0600 suggested.

root@obs-server:/home/obs# chmod 600 /swapfile

chmod: cannot access '/swapfile': No such file or directory

root@obs-server:/home/obs# ^C

root@obs-server:/home/obs# chmod 600 /swap.img

root@obs-server:/home/obs# swapon  /swap.img

swapon: /swap.img: swapon failed: Device or resource busy

root@obs-server:/home/obs# swapoff  /swap.img

root@obs-server:/home/obs# swapon  /swap.img

Installing OBS on Ubuntu

Faced this issue:

https://obsproject.com/forum/threads/obs-ndi-4-9-1-1-error-dependency-is-not-satisfiable-obs-studio-25-0-7.131703/

Solution:

https://github.com/Palakis/obs-ndi/issues/497

https://obsproject.com/wiki/install-instructions#linux

sudo apt -y remove obs-ndi obs-studio obs-plugins libobs0

 sudo apt install ffmpeg 

sudo apt install v4l2loopback-dkms

 sudo add-apt-repository ppa:obsproject/obs-studio
 sudo apt update
 sudo apt install obs-studio

Installing GUI on ubuntu

 How to Install a Graphical User Interface on Ubuntu Server (servermania.com)