Linux Midterm 01 Prep - Quiz 03 (Recovery)

What command would you use to create an alias named "list" to execute ls -ail?

• alias list='ls -ail'

• alias list="ls -ail"

• alias list="ls -la"

• alias list='ls -l'

Answer explanation

Option B (alias list="ls -ail") is technically correct and works the same as Option A (alias list='ls -ail'). Both single quotes (') and double quotes (") can be used to create an alias in most shells, like Bash.

Here's the difference:

• Single quotes (') keep everything inside them exactly as it is, without changing anything.

• Double quotes (") allow things like variables or special characters to change if needed.
  

In this case, since no variables or special characters are involved, both A and B will work just fine.

Which command would append the contents of the /etc directory to an existing file dump.txt?

• ls /etc > ~/Assignment5/dump.txt

• ls /etc >> ~/Assignment5/dump.txt

• cat /etc > ~/Assignment5/dump.txt

• find /etc >> ~/Assignment5/dump.txt

Which command would display the first 5 pathnames from the /etc directory?

• find /etc | tail -5

• find /etc | wc -l

• find /etc | head -5

• find /etc | sort | head -5

To count the number of files in a directory matching the pattern Week??, which command would you use?

• find . -type d -name "Week*"

• find . -type f -name "Week??" | wc -l

• find . -type f -name "Week?"

• ls Week?? | wc -l

How can you redirect both standard output and error output to the same file?

• command > file.txt

• command 2> file.txt

• command > file.txt 2>&1

• command 2>1 > file.txt

if my current working directory is /home, and my HOME directory is /home/foo, which command copies file /bin/ls into my HOME directory under the name xx?

• cp ../../bin/./ls /foo/xx

• cp ./../bin/ls ../foo/xx

• cp ./foo/../../bin/ls ./foo/./xx

• cp ././foo/../bin/ls ../home/foo/xx

If I am in directory /home/user and tim is an empty sub-directory, what is true after this command line:

touch tim/./user user ; rm ./tim/user ../user/user

• the command fails because the path ./tim/user does not exist

• the directory user now contains a file named user

• the directory tim is still empty

• the command fails because the path ../user/user does not exist

• the directory tim now contains a file named user

If I am in directory /home/onk and mt is an empty sub-directory,

what is true after this command line:

touch onk moo ; mkdir brk ; mv moo brk/mt

• the directory mt is still empty

• the directory brk now contains a file named moo

• the command fails because brk/mt is not a directory

• the directory mt now contains a file named moo

• the directory mt now contains a directory named brk

What is the output of this successful command sequence?

cd /home/dir ; mkdir one ; mkdir two ; pwd

• /home/dir

• /home/dir/one

• /home/dir/two

• /two

• /home/dir/one/two

Match the commands with their descriptions:

• alias list='ls -ail'

• Append /etc contents to dump.txt.

• ls /etc >>dump.txt

• Display first 5 lines of pathnames in /etc.

• find .-name 'Wee??'

• Create an alias that lists detailed file info.

• cat /etc/passwd >dump.txt

• Redirects /etc/passwd contents to a file.

• `find /etc

• head -5`