roscore报错

提示:

WARNING: unable to configure logging. No log files will be generated

Checking log directory for disk usage. This may take awhile.
Press Ctrl-C to interrupt
Done checking log file disk usage. Usage is <1GB.
Invalid tag: Cannot load command parameter [rosversion]: command [rosversion roslaunch] returned with code [1]. 



Param xml is


环境变量需要配置一下:source /opt/ros/hydro/setup.bash  

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