![]() They have been ignored, or old ones used instead. N: See apt-secure(8) manpage for repository creation and user configuration details.Į: Failed to fetch Unable to find expected entry '' in Release file (Wrong sources.list entry or malformed file)Į: Failed to fetch 404 Not Found Į: Some index files failed to download. N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use. W: The repository ' xenial Release' does not have a Release file. sudo apt-get update If it is better, go back and enable each repo and recheck one by one until you find the problem repo. So when you run update command, it downloads the package information from the Internet. See also the apt-get (8) manual page, as well as Section 8.1.2, APT. Then run apt-get update followed by apt-get dist-upgrade Answer any questions that might come up, and your system will be upgraded. The sources often defined in the /etc/apt/sources.list file and other files located in /etc/apt/ directory. To use apt-get, edit the /etc/apt/sources.list file to set it up, just as for Section 9.1.1, aptitude. *Error Message / Sever: Err:11 xenial/main amd64 Packages 404 Not Found The sudo apt-get update command is used to download package information from all configured sources. ★ROS-kinetic / Rviz / gazebo /turtlebot3 > already installed Ubuntu 16.04 / ROS-kinetic / Notebook: / Multi-boot: Windows 10 (C drive) / Ubuntu (E drive) sudo apt update sudo apt upgrade sudo do-release-upgrade While understandable repos wont be hosted super long, it would be very helpful if this migration could be recognized by the apt tool and the fix automatically suggested/applied. Fix PATH: sudo apt-get install -reinstall nodejs-legacy fix /usr/bin/node. To upgrade to latest version (and not current stable) version, you can use. ![]() sudo npm cache clean -f sudo npm install -g n sudo n stable. ![]() *Purpose: Install "turtlebot" for kinetic(16.04) / (ROS book - Morgan Quigley, studying) Use n module from npm in order to upgrade node.
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