roscore之后报错：
[rosout-1] process has died [pid 13103, exit code 127, cmd /opt/ros/melodic/lib/rosout/rosout __name:=rosout __log:=/home/smile2/.ros/log/fe5831bc-b919-11eb-8175-3c58c26f458c/rosout-1.log].
log file: /home/smile2/.ros/log/fe5831bc-b919-11eb-8175-3c58c26f458c/rosout-1*.log
[rosout-1] restarting process
解决方案：
https://blog.csdn.net/qq_44649945/article/details/117072723
重点！！！！：重启电脑
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