单项选择题

Forsecurityreasons，anadministratorisaskedtomodifythesys……

For security reasons， an administrator is asked to modify the system to prevent someone from leaving a terminal logged in. To enable a five minute timeout for all users， what would need to be done to accomplish this task？（）

A.Add the following line to /etc/environment： TMOUT=300
B.Add the following lines to /.profile TMOUT=5 export TMOUT
C.Execute the following command： chuser -u ALL -a TIMEOUT=5M
D.Execute the following command： chsec -u ALL -a TIMEOUT=600

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热门试题

单项选择题WhichactionchangesthedefaulteditorforALLusersonthesystemfromvitoeditofthefollowing？（）

A.Issue the command： export EDITOR=/usr/bin/edit
B.Modify /.profile and change the EDITOR variable to /usr/bin/edit
C.Modify /etc/environment and add EDITOR=/usr/bin/edit export EDITOR
D.Modify /etc/security/defaults and change the EDITOR value to /usr/bin/edit

单项选择题Howdoesasystemadministratoraddanewusertoasystem？（）

A.mkuser
B.cruser
C.adduser
D.edit /etc/password

单项选择题Auserwantstobepermanentlyaddedtothedbagroup.Whichcommandorprocesscanbeusedtoaccomplishthis？（）

A.chgrp
B.chuser
C.setgroups
D.edit /etc/security/group

单项选择题Duetooperationalcommitments，asystemhasaveryshortbackupwindowduringtheweek，butisnotusedfromSaturdaymorningthroughSundayatMidnight.Whichofthefollowingminimizesbackuptime，whileprovidingthebestdatarestorecoverage？（）

A.Full backups every night
B.Differential backups every night
C.Full backup Saturday night， incremental backups the rest of the week
D.Full backup Saturday night， differential backups the rest of the week

单项选择题AsystemadministratorperformsafullbackupeverySaturdayeveningandincrementalbackupstherestoftheweek.ThesystemfailedonThursdayandneedstoberestored.Whichbackuptapeswillberequiredtorestorethesystemtoitsmostrecentrecoverablestate？（）

A.Saturday’s full backup tape only
B.Wednesday’s incremental backup tape only
C.Saturday’s full backup and Wednesday’s incremental backup tapes
D.Saturday’s full backup and Sunday’s through Wednesday’s incremental backup tapes