多项选择题
A.Start-all.shB.start-dfs.shC.start-yarn.shD.start-hadoop.sh
A.CommonB.hdfsC.YarnD.MapReduce
A.rm -rf ./test_chk_lnB.rm -rf ./test_chk_ln/C.rm -r ./test_chk_ln/D.delete ./test_chk_ln/