单项选择题

How can permissions be set up on /tmp so that a user cannot delete another user’s files？（）

A.chmod +s /tmp
B.chmod 775 /tmp
C.chmod 1777 /tmp
D.chmod 4755 /tmp

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单项选择题

While installing an application， the administrator is instructed to perform two final tasks prior to starting the application：
1.Set the ownership of a file named ’control_file’ to be owned by the user ’database’ and the group ’appsrvr’.
2.Change the permissions of ’control_file’ to 0766.
After these two tasks have been completed， what will the file permissions look like when ’ls -l control_file’ is executed？（）

A.-rwxrw-rw- 1 database appsrvr 4913 Mar 17 08：24 control_file
B.-rw-r--r-- 1 appsrvr database 4913 Mar 17 08：24 control_file
C.-rw-r--r-- 1 database appsrvr 4913 Mar 17 08：24 control_file
D.-rwxrw-rw- 1 appsrvr database 4913 Mar 17 08：24 control_file

单项选择题

A system administrator wants to give full read/write/excute access to the owner and group of the /stuff directory and all subdirectories and files， but only allow read/execute for others. What command would the administrator use？（）

A.chmod -R 775 /stuff
B.chmod -h 002 /stuff
C.chmod -R 577 /stuff
D.chmod ug+rwx，o+rx /stuff

单项选择题

A user reports that they cannot cd to /tmp/application. A system administrator entered the following command：
（1）ls -ld /tmp/application
（2）drw-r--r-- 4 root system 512 Jan 15 14：09 application
What is the most likely cause of the problem？（）

A.The /tmp/application should be globally writable.
B.The /tmp/application directory should be executable.
C.The /tmp/application directory should be owned by the user.
D.The /tmp/application directory should have the sticky bit set.