A junior systems administrator has generated a PKI certificate for SSH sessions. The administrator would like to configure authentication without passwords to remote systems. Which of the following should the administrator perform?

• A.Add the content of id_rsa.pubfile to the remote system ~/.ssh/authorized_keyslocation.
• B.Add the content of id_rsafile to the remote system ~/.ssh/authorized_keyslocation.
• C.Add the content of id_rsafile to the remote system ~/.ssh/known_hostslocation.
• D.Add the content of id_rsa.pubfile to the remote system ~/.ssh/known_hostslocation.

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A Linux administrator must identify a user with high disk usage. The administrator runs the # du -s /home/* command and gets the following output:

Based on the output, User3 has the largest amount of disk space used. To clean up the file space, the administrator needs to find out more information about the specific files that are using the most disk space.
Which of the following commands will accomplish this task?

• A.du -a /home/User3/*
• B.find . -name /home/User3 -print
• C.du -sh /home/User/
• D.df -k /home/User/files.txt

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A technical support engineer receives a ticket from a user who is trying to create a 1KB file in the /tmp directory and is getting the following error No space left on device. The support engineer checks the /tmp directory, and it has 20GB of free space.
Which of the following BEST describes a possible cause for this error?

• A.The /tmp directory is not mounted.
• B.The filesystem is formatted with a 4MB block size.
• C.the filesystem ran out of inodes.
• D.The /tmp directory has been set with an immutable attribute.

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A Linux administrator needs to add some files in a directory to the Git repository but must exclude some local
.tmp files that are occasionally created by the scripts.
Which of the following is the BEST way to accomplish this task?

• A.git rm .tmp
• B.git add -x .tmp *
• C.echo .tmp >> .gitignore
• D.rm -rf .tmp

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A Linux administrator implemented a new HTTP server using the default configuration. None of the users on the network can access the server. If there is no problem on the network or with the users' workstations, which of the following steps will BEST analyze and resolve the issue?

• A.Run netstatto ensure the port is correctly bound, and configure the firewall to allow access on ports 80 and 443
• B.Run routeto ensure the port is correctly bound, and configure the firewall to allow access on ports 80 and
  443
• C.Run netcat to ensure the port is correctly bound, and configure a static route to the web to allow access on ports 80 and 443
• D.Run routeto ensure the port is correctly bound, and configure SELinux to allow access on ports 80 and
  443

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