单项选择题 Given the following scripts， both found in /usr/local/bin， what would the output be when executing /usr/local/bin/script1？（）

单项选择题 Howcanpermissionsbesetupon/tmpsothatausercannotdeleteanotheruser’sfiles？（）

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？（）