wangzhengquan
2020-10-12 bd9d61c39d04f5b5860418a2d558c07d9b0a69d0
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ipcrm -a
rm *.txt
./test_lostdata
sort -n c.txt  > c1.txt
sort -n p.txt  > p1.txt
diff -u p1.txt c1.txt