单项选择题
A.usrck
B.sysck
C.lssec
D.lsuser
单项选择题 Asystemadministratorhasbeenaskedtolockaspecificloginaccount.Whichofthefollowingcommandsisusedtoaccomplishthis？（）
单项选择题 Auserwouldliketheirshellprompttoreflectthecurrentdirectory.Whichofthefollowingenvironmentvariablescanbesettoaccomplishthis？（）
单项选择题 WhichofthefollowingcommandscanbeusedtogetthesystemreadytophysicallyinsertaPCIhotplugadaptor？（）