ubuntu server 20.04 上的 ros noetic 安装
sudo apt update
Hit:1 http://ports.ubuntu.com/ubuntu-ports focal InRelease
Hit:2 http://packages.ros.org/ros/ubuntu focal InRelease
Hit:3 http://ports.ubuntu.com/ubuntu-ports focal-backports InRelease
Hit:4 http://ports.ubuntu.com/ubuntu-ports focal-security InRelease
Get:5 http://ports.ubuntu.com/ubuntu-ports focal-updates InRelease [114 kB]
Reading package lists... Done
E: Release file for http://ports.ubuntu.com/ubuntu-ports/dists/focal-updates/InRelease is not valid yet (invalid for another 6h 8min 0s). Updates for this repository will not be applied.
rpi@ubuntu:~$ sudo apt install ros-noetic-desktop-full
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package ros-noetic-desktop-full