Intel RealSense Utilities Install Ubuntu 20.04 Focal 20210518

Install RealSense Utilities

• Installing rs-enumerate-devices is the goal of this step. It is required a Foxy configuration step.
• librealsense distribution These utilities run under Ubuntu (not ROS 2)
• Followed the instuctions for Ubuntu 20.04 LTS (Focal Fossa). See the reference to "focal" in the second step below.
• The order is important which I messed up. See the log and notes at the bottom.

 $ sudo apt-key adv --keyserver keys.gnupg.net --recv-key F6E65AC044F831AC80A06380C8B3A55A6F3EFCDE || sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-key F6E65AC044F831AC80A06380C8B3A55A6F3EFCDE
 
 $ sudo add-apt-repository "deb https://librealsense.intel.com/Debian/apt-repo focal main" -u

 $ sudo apt-get install librealsense2-utils

 $ apt list | grep librealsense

The apt list returns more hits because we expanded the apt repository above.