单项选择题
A system administrator is unable to unmount a file system. Which is the appropriate command to determine who or what is accessing the file system？（）
A.who /filesystem
B.lsfs /filesystem
C.fuser /filesystem
D.umount -f /filesystem
相关考题
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单项选择题
Asystemadministratorwantstoconfigureasystemsothatallnewuserswillbeputintothedatabasegroupbydefault.Howwouldthisbeaccomplished？（）
A.remove all other groups from the system
B.run the command mkuser -default "GROUP=database"
C.change the default group in /usr/lib/security/mkuser.default
D.edit /etc/security/group to move all users to the database stanza -
单项选择题
Asystemadministratorwouldliketomodifythesystemdefaultusercharacteristicssothateachnewuserwillnowbeassigned（bydefault）thecshshellratherthanthekshshell.Whichofthefollowingactionsshouldbeperformed？（）
A.Run the command chlogin -shell "csh"
B.Run the command mkuser -default "SHELL=csh"
C.Edit /etc/passwd and change all "ksh" entries to "csh"
D.Modify the contents of /usr/lib/security/mkuser.default file -
单项选择题
Forsecurityreasons，anadministratorisaskedtomodifythesystemtopreventsomeonefromleavingaterminalloggedin.Toenableafiveminutetimeoutforallusers，whatwouldneedtobedonetoaccomplishthistask？（）
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
