单项选择题

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

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

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单项选择题
A System p administrator has an application that has the data in volume group appvg.  Which of the following commands will back up the contents of appvg to the tape in  dev rmt0 and check for any read errors （）

A.savevg -mf /dev/rmt0 appvg
B.savevg -cvf /dev/rmt0 appvg
C.savevg -vf /dev/rmt0 appvg
D.savevg -f /dev/rmt0 -V appvg
单项选择题
Whichofthefollowingcommandswouldasystemadministratorusetoautomatemonitoringandnotificationoffillingfilesystems（）

A.startcondresp
B.filemon
C.lsfs
D.mount
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