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2022-12-06 12:48:52 -0500 answered a question sync ros bag timestamps with ros system

Hello as Procópio with detailed steps : first step: roscore second step: rosparam set use_sim_time true third st

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2020-08-31 01:40:46 -0500 asked a question when i begin to rosrun my publisher or subscriber node it keep give me an error

when i begin to rosrun my publisher or subscriber node it keep give me an error this the error : from: can't read /var/