Which of the following are valid stream redirection operators within Bash? (Choose two.)

• A.<
• B.#>
• C.%>
• D.>>>
• E.2>&1

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What output will be displayed when the user fred executes the following command?
echo 'fred $USER'

• A.'fred $USER'
• B.'fred fred'
• C.fred /home/fred/
• D.fred fred
• E.fred $USER

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In which directory must definition files be placed to add additional repositories to yum?

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Which of the following shell redirections will write standard output and standard error output to a file named filename?

• A.>filename 2>&1
• B.>>filename
• C.2>&1 >filename
• D.1&2>filename
• E.1>&2>filename

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What does the command mount -a do?

• A.It shows all mounted file systems that have been automatically mounted.
• B.It ensures that all file systems listed in /etc/fstab are mounted regardless of their options.
• C.It ensures that all file systems listed with the option noauto in /etc/fstab are mounted.
• D.It opens an editor with root privileges and loads /etc/fstab for editing.
• E.It ensuresthat all file systems listed with the option auto in /etc/fstab are mounted.

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