From a Bash shell, which of the following commands directly execute the instructions from the file /usr/ local/bin/runme.shwithout starting a subshell? (Choose two.)

• A./bin/bash /usr/local/bin/runme.sh
• B./usr/local/bin/runme.sh
• C./usr/local/bin/runme.sh
• D.source /usr/local/bin/runme.sh
• E.run /usr/local/bin/runme.sh

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Which of the following file permissions belong to a symbolic link?

• A.srwxrwxrwx
• B.lrwxrwxrwx
• C.-rwxrwxrwx
• D.+rwxrwxrwx

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After running the command umount /mnt, the following error message is displayed:
umount: /mnt: device is busy.
What is a common reason for this message?

• A.The kernel has not finished flushing disk writes to themounted device.
• B.A user has a file open in the /mnt directory.
• C.Another file system still contains a symlink to a file inside /mnt.
• D.The files in /mnt have been scanned and added to the locate database.
• E.The kernel thinks that a process is about to open a file in /mnt for reading.

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Which of the following commands sets the SetUID permission on the executable /bin/foo?
chmod 4755 /bin/foo

• A.chmod u-s /bin/foo
• B.chmod 755+s /bin/foo
• C.chmod 2755 /bin/foo
• D.
• E.chmod 1755 /bin/foo

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Which of the following commands prints a list of available package updates when using RPM-based package management?

• A.dpkg list
• B.yum list
• C.dpkg check-update
• D.yum check-update
• E.yum list-update

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