Unit 21

You are helping your friend troubleshoot a problem with their Linux server. You enter a common Linux command and discover it doesn't work exactly as you expected. What might be the problem, and what do you do next?

• The Linux shell is not the one you expected; use the echo $0 command.

• You probably don't know how to use the Linux command; search the web for information about the command.

• The Linux shell is not the one you expected; use the echo $SHELL command.

• The Linux installation is corrupted; restore the system from backup.

You are running a web server app in Ubuntu Server. Users complain that their browsers are loading webpages with errors. Where are you likely to find the log file where the web server reports its errors?

• /app/log

• /bin

• /var/log

• /root

In Linux, when logged in as a normal user with root privileges, which command must precede the apt-get command in the command line in order to install a program?

• sudo user

• su

• sudo

• root

You have set up an FTP server in Ubuntu Server. Dominique, a user, calls to say she gets an error when trying to put a file in her /home/dominique/files directory. You look at the directory structure and see that you forgot to give the user ownership of the directory. Which command can fix the problem?

• chown dominique:dominique /home/dominique files

• sudo chmod u+srwx /home/dominique files

• sudo chown dominique:dominique /home/dominique files

• chmod u+rwx /home/dominique/files/

You are managing an FTP server installed in Ubuntu Server. The server has created a very large log file, vsftpd.log. Which command is appropriate to search the log file for activity of the user nolan?

• sudo cat /var/log/vsftpd.log

• grep "nolan" /var/log/vsftpd.log

• sudo grep "nolan" /var/log/vsftpd.log

• cat /var/log/vsftpd.log

You work at an IT help desk and have been asked to set up 25 new user accounts in Active Directory. Your manager tells you to save time by using a PowerShell script that's available on a network share. You look at several script files named CreateNewUsers that are stored on the drive. Which one is likely to be the one you want?

• The file with a .ps1 file extension

• The file with a .js file extension

• The file that is the largest

• The file with a .bat file extension

A coworker is complaining that their connection to the Internet does not work. When you ask to examine the system, they show you a MacBook with Ubuntu Linux installed. Your initial assessment is that the Ethernet port does not have any lights flashing. You now want to check the configuration of the network card. Which of the following commands would allow you to view the necessary information?

• traceroute

• ip address

• ipconfig /all

• ip route

Backups of files can help restore files when something goes missing. Which of the following commands can be used to copy a file named ImportantInfo.txt from the desktop to a directory named Backups in the root directory?

• cp Desktop/ImportantInfo.txt ./Backups

• mv Desktop/ImportantInfo.txt ./Backups/ImportantInfo.txt

• cp Desktop/ImportantInfo.txt /Backups/ImportantInfo.txt

• mkdir root/ImportantInfo

While browsing the Internet, your web browser is not displaying the webpage correctly. The images and multimedia content are not showing or playing, and you want to watch your favorite music video on YouTube. What is one possible explanation for this issue?

• The Internet is not working.

• Your wireless network card is suffering from interference.

• The display driver needs updating.

• The JavaScript add-on is not activated.

You want to restart your Windows computer at the end of a PowerShell script you have built to update the operating system. Which of the following commands could be used to perform the restart in your script?

• Reboot-Computer

• Restart-Computer

• shutdown

• PowerOff Restart