Add Swap Memory $ sudo apt-get install zram-config $ sudo gedit /usr/bin/init-zram-swapping Replace the line: mem=$(((totalmem / 2 / ${NRDEVICES}) * 1024)) with this line: mem=$(((totalmem / ${NRDEVICES}) * 1024)) And then reboot. Install Opencv 4.1 1. Updating the packages: $ sudo apt update $ sudo apt install -y build-essential cmake git libgtk2.0-dev pkg-config libswscale-dev libtbb2 libtbb-d..