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單項(xiàng)選擇題

A system’s backups are failing. Error log analysis indicates that there is either a hardware or media problem. Which command is used to determine if there is a hardware problem with the tape drive？（）

A.diag
B.lscfg
C.lsdev
D.cfgmgr

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單項(xiàng)選擇題

A system administrator would like to verify the user definitions in the /etc/passwd file. Which of the following commands will accomplish this？（）

A.usrck
B.sysck
C.lssec
D.lsuser

單項(xiàng)選擇題

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