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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：（）

A. ：!ls-I myfile
B. ：\ls-l myfile
C. esc ：Is -I myfile
D. ：？ls-l myfile

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

A. cut -d： -f 1，3 /etc/passwd
B. chop -c 1，3 /etc/passwd
C. tac 1-3/etc/passwd
D. fmt -u /etc/passwd

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

A. export LD_PRELOAD=/usr/local/lib
B. export LD_LIBRARY_PATH=/usr/local/lib
C. Idconfig /usr/local/lib
D. Idd/usr/local/lib

單項選擇題

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

A. -remove removes the program， -purge also removes the config files
B. -remove only removes the program， -purge only removes the config files
C. -remove removes a package， -purge also removes all packages dependent on it
D. -remove removes only the package file itself， -purge removes all files related to the package

單項選擇題

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？（）

A. tr ’\r\n’ " < userlist.txt > newlist.txt
B. tr -c ’\n\r’ " < newlist.txt > userlist.txt
C. tr -d \r¯ < userlist.txt > newlist.txt
D. tr \r¯\n¯ userlist.txt newlist.txt
E. tr -s ®^M’¡®^J’ userlist.txt newlist.tx

單項選擇題

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

A. Idconfig
B. Idd
C. libpath
D. newlibs

填空題

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

答案：/BIN/DF

單項選擇題

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？（）

A. SCSI-1 supports only 8 devices including the adaptor.
B. SCSI-1 supports only 6 disks per adaptor.
C. There is a SCSI-ID conflict that causes that problem.
D. You forgot to set the SCSI-ID #8 for the new disk.

單項選擇題

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

A. kill-1 123
B. kill-9 123
C. kill-15 123
D. kill-17 123

單項選擇題

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

A. chmod 557 /bin/foo
B. chmod o+rwx.a+rx/bin/foo
C. chown 557 /bin/foo
D. chmod 755/bin/foo

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

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：（）

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

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

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

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？（）

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

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

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？（）

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

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(xí)(2019.04.23)

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：（）

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

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

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

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？（）

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

Which command （without options） would you use to display how much space is available on all mounted partitions？（）

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？（）

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

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

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：（）

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

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

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？（）

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

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

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？（）

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