单项选择题

A system administrator has been asked to lock a specific login account. Which of the following commands is used to accomplish this？（）

A.pwdck
B.usrck
C.chuser
D.rmuser

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单项选择题

Auserwouldliketheirshellprompttoreflectthecurrentdirectory.Whichofthefollowingenvironmentvariablescanbesettoaccomplishthis？（）

A.PS1
B.PATH
C.PROMPT
D.LOCPATH

单项选择题

WhichofthefollowingcommandscanbeusedtogetthesystemreadytophysicallyinsertaPCIhotplugadaptor？（）

A.mkdev
B.cfmgr
C.drslot
D.lsslot

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