单项选择题
A.diag
B.lscfg
C.lsdev
D.cfgmgr
单项选择题 Asystemadministratorwouldliketoverifytheuserdefinitionsinthe/etc/passwdfile.Whichofthefollowingcommandswillaccomplishthis？（）
单项选择题 Asystemadministratorhasbeenaskedtolockaspecificloginaccount.Whichofthefollowingcommandsisusedtoaccomplishthis？（）
单项选择题 Auserwouldliketheirshellprompttoreflectthecurrentdirectory.Whichofthefollowingenvironmentvariablescanbesettoaccomplishthis？（）