Merge branch 'dev'

wangzhengquan

2020-12-24 0fd19aa1c8a2bf543099d6b1077ff19078f9074e

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ipcrm -a
 
./dgram_mod_req_rep server 2 & node0=$! && sleep 1
./dgram_mod_req_rep client 2 node1
kill $node0