博客

Melodic

1、错误信息是这样的

[WARN] [1582867522.390661]: The 'use_gui' parameter was specified, which is deprecated.  We'll attempt to find and run the GUI, but if this fails you should install the 'joint_state_publisher_gui' package instead and run that.  This backwards compatibility option will be removed in Noetic.
[ERROR] [1582867522.392212]: Could not find the GUI, install the 'joint_state_publisher_gui' package
[joint_state_publisher-2] process has died [pid 9056, exit code 1, cmd /opt/ros/melodic/lib/joint_state_publisher/joint_state_publisher __name:=joint_state_publisher __log:=/home/vtas/.ros/log/b6cbe59e-59ea-11ea-b2f1-84ef181f5770/joint_state_publisher-2.log].
log file: /home/vtas/.ros/log/b6cbe59e-59ea-11ea-b2f1-84ef181f5770/joint_state_publisher-2*.log

信息提示安装“joint_state_publisher_gui”

sudo apt-get install ros-melodic-joint-state-publisher-gui

无法下载软件包

参考：http://answers.ros.org/question/325039/apt-update-fails-cannot-install-pkgs-key-not-working/

就是把密钥换了，具体方法如下：

1、删除旧密钥

sudo apt-key del 421C365BD9FF1F717815A3895523BAEEB01FA116

2、安装新密钥

sudo -E apt-key adv --keyserver 'hkp://keyserver.ubuntu.com:80' --recv-key C1CF6E31E6BADE8868B172B4F42ED6FBAB17C654

3、最后执行两个命令安装

sudo apt update

sudo apt-get install ros-melodic-joint-state-publisher-gui

提示安装成功了

正在读取软件包列表... 完成
正在分析软件包的依赖关系树       
正在读取状态信息... 完成       
ros-melodic-joint-state-publisher-gui 已经是最新版 (1.12.15-1bionic.20200821.031217)。
升级了 0 个软件包，新安装了 0 个软件包，要卸载 0 个软件包，有 467 个软件包未被升级。

启动launch文件

roslaunch mbot_description display_mbot_base_urdf.launch 

出现需要的插件

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参考：http://answers.ros.org/question/325039/apt-update-fails-cannot-install-pkgs-key-not-working/

https://blog.csdn.net/L___1/article/details/108340277