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1 Using vi， you want to save changes to the file myfile with ：w!， but vi complains it cannot write to the file. Therefore， you want to check the write permissions on the file. To do this without leaving vi， you type：（）

2 What command will print a list of usernames （first column） and their corresponding user id （uid， third column） from /etc/passwd？（）

3 Which of these commands allows you to use shared libraries that are in /usr/local/lib？（）

4 What is the difference between thE.remove and thE.purge action with the dpkg command？（）

5 Which of the following commands will change all CR-LF pairs in an imported text file， userlist.txt， to Linux standard LF characters and store it as newlist.txt？（）

6 Which system administration command you can use to update Id.so.cache after the installation of new shared libraries？（）

7.填空題Which command （without options） would you use to display how much space is available on all mounted partitions？（）

8 You ran out of space and added a eighth disk to your SCSI-1 system. When you try to start， the system no longer boots. What is most likely the cause of this problem？（）

9 You wish to kill a process with a PID of 123. Select the command which exiting.（）

10 Which of the following commands makes /bin/foo executable by everyone but writable only by its owner？（）

CompTIA認證考試LX0-101章節(jié)練習(2019.04.23)