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單項選擇題

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

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單項選擇題

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

單項選擇題

A user would like their shell prompt to reflect the current directory. Which of the following environment variables can be set to accomplish this？（）

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