ubuntu18.04 下运行roscore报错：[rosout-1] process has died [pid 13103, exit code 127

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