Question 1

Which of the following commands will send output from the program myapp to both standard output (stdout) and the file file1.log?
A) cat < myapp | cat > file1.log
B) myapp 0>&1 | cat > file1.log
C) myapp | cat > file1.log
D) myapp | tee file1.log
E) tee myapp file1.log

Accepted Answer

The `tee` command reads from standard input and writes to both standard output and one or more files, making option D the correct choice.

Question 2

Which of the following commands displays the contents of a gzip compressed tar archive?
A) gzip archive.tgz | tar xvf -
B) tar ztf archive.tgz
C) gzip -d archive.tgz | tar tvf -
D) tar cf archive.tgz

Accepted Answer

The command "tar ztf archive.tgz" lists the contents of a gzip compressed tar archive without extracting it.

Question 3

What is the maximum niceness value that a regular user can assign to a process with the nice command when executing a new process?
A) 9
B) 19
C) 49
D) 99

Accepted Answer

The maximum niceness value a regular user can assign to a process using the nice command is 19. This value makes the process run with the lowest priority.

Question 4

Which of the following commands is used to change options and positional parameters for a running Bash?
A) history
B) set
C) bashconf
D) setsh
E) envsetup

Accepted Answer

The `set` command in Bash is used to change shell options and positional parameters for a running shell session.

Question 5

Immediately after deleting 3 lines of text in vi and moving the cursor to a different line, which single character command will insert the deleted content below the current line?
A) i (lowercase)
B) P (uppercase)
C) p (lowercase)
D) U (uppercase)
E) u (lowercase)

Accepted Answer

The 'p' (lowercase) command in vi is used to paste the most recently deleted or yanked text after the current line.

Question 6

Which of the following commands kills the process with the PID 123 but allows the process to "clean up" before exiting?
A) kill -PIPE 123
B) kill -KILL 123
C) kill -STOP 123
D) kill -TERM 123

Accepted Answer

The `kill -TERM` command sends the SIGTERM signal, which allows the process to perform cleanup operations before terminating.

Question 7

Which of the following commands replaces each occurrence of 'bob' in the file letter with 'Bob' and writes the result to the file newletter?
A) sed '/bob/Bob' letter > newletter
B) sed s/bob/Bob/ letter < newletter
C) sed 's/bob/Bob' letter > newletter
D) sed 's/bob/Bob/g' letter > newletter
E) sed 's/bob, Bob/' letter > newletter

Accepted Answer

The command in option D uses 'sed' with the 's' command to substitute 'bob' with 'Bob' globally (due to the 'g' flag) in the file 'letter' and redirects the output to 'newletter'.

Question 8

Which of the following characters can be combined with a separator string in order to read from the current input source until the separator string, which is on a separate line and without any trailing spaces, is reached?
A) <<
B) <|
C) !<
D) &<

Accepted Answer

The '<<' operator in shell scripting is used for here documents, which allows reading input until a specified delimiter is reached.

Question 9

What is the purpose of the Bash built-in export command?
A) It allows disks to be mounted remotely.
B) It runs a command as a process in a subshell.
C) It makes the command history available to subshells.
D) It sets up environment variables for applications.
E) It shares NFS partitions for use by other systems on the network.

Accepted Answer

The export command in Bash is used to set environment variables, making them available to child processes and subshells.

Question 10

What does the symbol within regular expressions represent?
A) Match the preceding qualifier one or more times.
B) Match the preceding qualifier zero or more times.
C) Match the preceding qualifier zero or one times.
D) Match a literal character.

Accepted Answer

The answer of What does the symbol within regular expressions...

Question 11

Which of the following commands moves and resumes in the background the last stopped shell job?
A) run
B) bg
C) fg
D) back

Accepted Answer

bg is the command that moves and resumes in the background the last stopped shell job.

Question 12

In the vi editor, how can commands such as moving the cursor or copying lines into the buffer be issued multiple times or applied to multiple rows?
A) By using the command :repeat followed by the number and the command.
B) By specifying the number right in front of a command such as 4l or 2yj.
C) By selecting all affected lines using the shift and cursor keys before applying the command.
D) By issuing a command such as :set repetition=4 which repeats every subsequent command 4 times.

Accepted Answer

In vi editor, you can repeat commands by prefixing them with a number. For example, "4l" moves the cursor 4 characters to the right, and "2yj" yanks (copies) 2 lines into the buffer.

Question 13

What command will generate a list of user names from /etc/passwd along with their login shell?
A) column -s : 1,7 /etc/passwd
B) chop -c 1,7 /etc/passwd
C) colrm 1,7 /etc/passwd
D) cut -d: -f1,7 /etc/passwd

Accepted Answer

The `cut` command with `-d:` specifies the delimiter as `:` and `-f1,7` selects the first and seventh fields, which correspond to the username and login shell in the `/etc/passwd` file.

Question 14

Which grep command will print only the lines that do not end with a / in the file foo?
A) grep '/$' foo
B) grep '/#' foo
C) grep -v '/$' foo
D) grep -v '/#' foo

Accepted Answer

The `-v` option in `grep` inverts the match, so `grep -v '/$' foo` will print lines that do not end with a `/`.

Question 15

In a nested directory structure, which find command line option would be used to restrict the command to searching down a particular number of subdirectories?
A) -dirmax
B) -maxdepth
C) -maxlevels
D) -n
E) -s

Accepted Answer

-maxdepth is the command line option used to restrict the find command to searching down a particular number of subdirectories.

Question 16

Which of the following files, located in the user home directory, is used to store the Bash history?
A) .bash_history
B) .bash_histfile
C) .history
D) .bashrc_history
E) .history_bash

Accepted Answer

The .bash_history file in the user's home directory is used to store the command history for the Bash shell.

Question 17

What is the difference between the i and a commands of the vi editor?
A) i (interactive) requires the user to explicitly switch between vi modes whereas a (automatic) switches modes automatically.
B) i (insert) inserts text before the current cursor position whereas a (append) inserts text after the cursor.
C) i (independent rows) starts every new line at the first character whereas a (aligned rows) keeps the indentation of the previous line.
D) i (interrupt) temporarily suspends editing of a file to the background whereas a (abort) terminates editing.

Accepted Answer

i (insert) inserts text before the current cursor position whereas a (append) inserts text after the cursor.

Question 18

A user accidentally created the subdirectory \dir in his home directory. Which of the following commands will remove that directory?
A) rmdir '~/\dir'
B) rmdir "~/\dir"
C) rmdir ~/'dir'
D) rmdir ~/\dir
E) rmdir ~/\dir

Accepted Answer

The answer of A user accidentally created the subdirectory \dir...

Question 19

In compliance with the FHS, in which of the directories are man pages found?
A) / usr /share/man
B) /opt/man
C) / usr /doc/
D) /var/pkg/man
E) /var/man

Accepted Answer

The Filesystem Hierarchy Standard (FHS) specifies that manual pages should be located in the /usr/share/man directory.

Question 20

What is the default action of the split command on an input file?
A) It will break the file into new files of 1,024 byte pieces each.
B) It will break the file into new files of 1,000 line pieces each.
C) It will break the file into new files of 1,024 kilobyte pieces each.
D) It will break the file into new files that are no more than 5% of the size of the original file.

Accepted Answer

The default action of the split command is to break the file into new files of 1,000 line pieces each.

Exam 1: Linux Foundation Certified System Administrator

Which of the following commands will send output from the program myapp to both standard output (stdout) and the file file1.log?

Which of the following commands displays the contents of a gzip compressed tar archive?

What is the maximum niceness value that a regular user can assign to a process with the nice command when executing a new process?

Which of the following commands is used to change options and positional parameters for a running Bash?

Immediately after deleting 3 lines of text in vi and moving the cursor to a different line, which single character command will insert the deleted content below the current line?

Which of the following commands kills the process with the PID 123 but allows the process to "clean up" before exiting?

Which of the following commands replaces each occurrence of 'bob' in the file letter with 'Bob' and writes the result to the file newletter?

Which of the following characters can be combined with a separator string in order to read from the current input source until the separator string, which is on a separate line and without any trailing spaces, is reached?

What is the purpose of the Bash built-in export command?

What does the symbol within regular expressions represent?

Which of the following commands moves and resumes in the background the last stopped shell job?

In the vi editor, how can commands such as moving the cursor or copying lines into the buffer be issued multiple times or applied to multiple rows?

What command will generate a list of user names from /etc/passwd along with their login shell?

Which grep command will print only the lines that do not end with a / in the file foo?

In a nested directory structure, which find command line option would be used to restrict the command to searching down a particular number of subdirectories?

Which of the following files, located in the user home directory, is used to store the Bash history?

What is the difference between the i and a commands of the vi editor?

A user accidentally created the subdirectory \dir in his home directory. Which of the following commands will remove that directory?

In compliance with the FHS, in which of the directories are man pages found?

What is the default action of the split command on an input file?