题目内容
Asystemadministratorisunabletounmountafilesystem.Whichistheappropriatecommandtodeterminewhoorwhatisaccessingthefilesystem？（）
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Whileinstallinganapplication，theadministratorisinstructedtoperformtwofinaltaskspriortostartingtheapplication：1.Settheownershipofafilenamed’control_file’tobeownedbytheuser’database’andthegroup’appsrvr’.2.Changethepermissionsof’control_file’to0766.Afterthesetwotaskshavebeencompleted，whatwillthefilepermissionslooklikewhen’ls-lcontrol_file’isexecuted？（）
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Asystemadministratorhasaserverthatisperformingpoorly.ThevmstatcommandidentifiesthathighCPUusageistheproblem.Whichofthefollowingcommandscanbeusedtoidentifytheeightmostactiveprocessesrunningontheserver？（）
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