检验是否安装成果ros

要检查ROS是否成功安装，请在终端中输入以下命令：

roscore

如果您看到类似以下的输出，则表示ROS已经成功安装并正在运行：

... logging to /home/user/.ros/log/550e8400-e29b-41d4-a716-446655440000/roslaunch-your-computer-name-1234.log
Checking log directory for disk usage. This may take awhile.
Press Ctrl-C to interrupt
Done checking log file disk usage. Usage is <1GB.

started roslaunch server http://your-computer-name:1234/

SUMMARY
========

PARAMETERS
 * /rosdistro: noetic
 * /rosversion: 1.15.9

NODES

auto-starting new master
process[master]: started with pid [1234]
ROS_MASTER_URI=http://your-computer-name:11311/

setting /run_id to 550e8400-e29b-41d4-a716-446655440000
process[rosout-1]: started with pid [5678]
started core service [/rosout]

如果您看到类似以下的错误，则表示ROS未能成功安装：

bash: roscore: command not found

如果出现这种情况，请确保已经正确安装了ROS，或者尝试重新安装ROS。