安装过程:
# -------------- ros 安装 melodic -----------------------
sudo sh -c '. /etc/lsb-release && echo "deb http://mirrors.tuna.tsinghua.edu.cn/ros/ubuntu/ $DISTRIB_CODENAME main" > /etc/apt/sources.list.d/ros-latest.list'
sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-key C1CF6E31E6BADE8868B172B4F42ED6FBAB17C654
sudo apt-get update
sudo apt-get install ros-melodic-desktop-full
sudo apt-get install python-rosinstall python-rosinstall-generator python-wstool build-essential ros-melodic-ros
sudo apt-get install ros-melodic-rqt*
sudo apt install rospack-tools
sudo rosdep init
rosdep update
# sudo rosdep init 和 rosdep update出错时
sudo pip install rosdepc
sudo rosdepc init
rosdepc update
# 环境配置
echo "source /opt/ros/melodic/setup.bash" >> ~/.bashrc
source ~/.bashrc
# 测试
roscore
rosrun turtlesim turtlesim_node
rosrun turtlesim turtle_teleop_key
问题及解决
1.sudo apt-get update 时出现ERROR

本文详细介绍了在Ubuntu 18.04上安装ROS Melodic过程中遇到的ERROR、rosdep初始化失败和权限问题的解决方法,包括源码修改、pip安装和权限调整。适合初次接触ROS的开发者参考。
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