单项选择题
A. Run ext2fs ACL.
B. Use a hard link.
C. Use a symbolic link.
D. Use the loopback device.
E. Create a block device offset.
单项选择题 Whatcommandwillprintalistofusernames（firstcolumn）andtheircorrespondinguserid（uid，thirdcolumn）from/etc/passwd？（）
单项选择题 Inxorg.conf，whichsectionisconcernedwithfonts？（）
单项选择题 Given the following output： prompt> myapp [1]+ Stopped myapp prompt> Which of the following commands will resume executing the stopped process while allowing the user to continue to type commands at the command prompt？（）