操作系统: Ubuntu 18.04
ROS版本: Melodic
测试时间:2021年06月20日
笔者在进行移动机器人 SLAM 建图仿真时,终端提示
ERROR: cannot launch node of type [gmapping/slam_gmapping]: gmapping
即无法找到相关的 gmapping 依赖,但是之前已经安装过了,此处根据终端提示,对gmapping 进行安装
sudo apt-get install ros-melodic-gmapping
终端反馈如下
The following NEW packages will be installed:
ros-melodic-gmapping
0 upgraded, 1 newly installed, 0 to remove and 109 not upgraded.
Need to get 241 kB of archives.
After this operation, 1,457 kB of additional disk space will be used.
Err:1 http://packages.ros.org/ros/ubuntu bionic/main amd64 ros-melodic-gmapping amd64 1.4.1-1bionic.20210112.191214
404 Not Found [IP: 64.50.233.100 80]
E: Failed to fetch http://packages.ros.org/ros/ubuntu/pool/main/r/ros-melodic-gmapping/ros-melodic-gmapping_1.4.1-1bionic.20210112.191214_amd64.deb 404 Not Found [IP: 64.50.233.100 80]
E: Unable to fetch some archives, maybe run ap

本文讲述了在Ubuntu 18.04的ROS Melodic环境下,遇到gmapping节点启动失败的问题,通过解决apt源签名验证错误和安装依赖包的过程,分享了如何修复404 NotFound错误和添加新的GPG密钥以继续包安装。
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