Question 1

Which of the following commands can be used to search for the executable file foo when it has been placed in a directory not included in $PATH?
A) apropos
B) which
C) find
D) query
E) whereis

Accepted Answer

The `find` command can be used to search for files in a directory hierarchy, regardless of whether the directory is in the $PATH.

Question 2

Which of the following signals is sent to a process when the key combination CTRL+C is pressed on the keyboard?
A) SIGTERM
B) SIGINT
C) SIGSTOP
D) SIGKILL

Accepted Answer

SIGINT is sent to a process when the key combination CTRL+C is pressed on the keyboard.

Question 3

Which of the following is the device file name for the second partition on the only SCSI drive?
A) /dev/hda1
B) /dev/sda2
C) /dev/sd0a2
D) /dev/sd1p2

Accepted Answer

The device file name for the second partition on the only SCSI drive is /dev/sda2, where "sda" refers to the first SCSI drive and "2" refers to the second partition.

Question 4

Which of the following commands will print the last 10 lines of a text file to the standard output?
A) cat -n 10 filename
B) dump -n 10 filename
C) head -n 10 filename
D) tail -n 10 filename

Accepted Answer

The `tail` command with the `-n` option is used to display the last 'n' lines of a file.

Question 5

In order to display all currently mounted filesystems, which of the following commands could be used? (Choose TWO correct choices.)
A) cat /proc/self/mounts
B) free
C) mount
D) lsmounts
E) cat /proc/filesystems

Accepted Answer

The answer of In order to display all currently mounted...

Question 6

Which of the following command sets the Bash variable named TEST with the content FOO?
A) set TEST="FOO"
B) TEST = "FOO"
C) var TEST="FOO"
D) TEST="FOO"

Accepted Answer

In Bash, variables are set using the syntax `VARIABLE_NAME=value` without spaces around the equal sign.

Question 7

Which of the following commands makes /bin/foo executable by everyone but writable only by its owner?
A) chmod u=rwx,go=rx /bin/foo
B) chmod o+rwx,a+rx /bin/foo
C) chmod 577 /bin/foo
D) chmod 775 /bin/foo

Accepted Answer

The command "chmod u=rwx,go=rx /bin/foo" sets the owner permissions to read, write, and execute (rwx) and the group and others permissions to read and execute (rx), making it executable by everyone but writable only by the owner.

Question 8

Which of the following commands will reduce all consecutive spaces down to a single space? A) tr '\s' ' ' < a.txt > b.txt B) tr -c ' ' < a.txt > b.txt C) tr -d ' ' < a.txt > b.txt D) tr -r ' ' ' ' < a.txt > b.txt E) tr -s ' ' < a.txt > b.txt

Accepted Answer

The `tr -s` command is used to squeeze repeated occurrences of the specified character, in this case, spaces, into a single space.

Question 9

Which of the following shell redirections will write standard output and standard error output to a file named filename?
A) 2>&1 >filename
B) >filename 2>&1
C) 1>&2>filename
D) >>filename
E) 1&2>filename

Accepted Answer

The redirection `>filename 2>&1` sends both standard output and standard error to the file named "filename".

Question 10

Which character, added to the end of a command, runs that command in the background as a child process of the current shell?
A) !
B) +
C) &
D) %
E) #

Accepted Answer

The '&' character is used in Unix-like operating systems to run a command in the background as a child process of the current shell.

Question 11

What happens after issuing the command vi without any additional parameters?
A) vi starts and loads the last file used and moves the cursor to the position where vi was when it last exited.
B) vi starts and requires the user to explicitly either create a new or load an existing file.
C) vi exits with an error message as it cannot be invoked without a file name to operate on.
D) vi starts in command mode and opens a new empty file.
E) vi starts and opens a new file which is filled with the content of the vi buffer if the buffer contains text.

Accepted Answer

When vi is started without any parameters, it opens in command mode with a new empty buffer, allowing the user to start editing a new file.

Question 12

Which of the following commands can be used to locate programs and their corresponding man pages and configuration files?
A) dirname
B) which
C) basename
D) query
E) whereis

Accepted Answer

The "whereis" command is used to locate the binary, source, and manual page files for a command.

Question 13

Which of the following commands changes the ownership of file.txt to the user dan and the group staff?
A) chown dan/staff file.txt
B) chown dan:staff file.txt
C) chown -u dan -g staff file.txt
D) chown dan -g staff file.txt

Accepted Answer

The correct syntax for changing the ownership of a file to a specific user and group in Unix/Linux is `chown user:group filename`.

Question 14

Regarding the command: nice -5 / usr /bin/prog Which of the following statements is correct?
A) / usr /bin/prog is executed with a nice level of -5.
B) / usr /bin/prog is executed with a nice level of 5.
C) / usr /bin/prog is executed with a priority of -5.
D) / usr /bin/prog is executed with a priority of 5.

Accepted Answer

The nice command adjusts the niceness level of a process, which affects its scheduling priority. A positive nice value of 5 means the process will run with lower priority compared to the default.

Question 15

When running the command sed -e "s/a/b/" /tmp/file >/tmp/file While /tmp/file contains data, why is /tmp/file empty afterwards?
A) The file order is incorrect. The destination file must be mentioned before the command to ensure redirection.
B) The command sed did not match anything in that file therefore the output is empty.
C) When the shell establishes the redirection it overwrites the target file before the redirected command starts and opens it for reading.
D) Redirection for shell commands do not work using the > character. It only works using the | character instead.

Accepted Answer

When the shell processes the command, it first opens the file for writing (which clears the file) before executing the `sed` command, resulting in an empty file.

Question 16

Which of the following commands changes the number of days before the ext3 filesystem on /dev/sda1 has to run through a full filesystem check while booting?
A) tune2fs -d 200 /dev/sda1
B) tune2fs -c 200 /dev/sda1
C) tune2fs -i 200 /dev/sda1
D) tune2fs -n 200 /dev/sda1
E) tune2fs --days 200 /dev/sda1

Accepted Answer

The command "tune2fs -i 200 /dev/sda1" sets the interval between filesystem checks to 200 days.

Question 17

When starting a program with the nice command without any additional parameters, which nice level is set for the resulting process?
A) -10
B) 0
C) 10
D) 20

Accepted Answer

By default, the nice command sets the nice level of a process to 10 if no additional parameters are specified.

Question 18

Which of the following are valid stream redirection operators within Bash? (Choose THREE correct choices.) A) < B) <<< C) > D) >>> E) %>

Accepted Answer

The answer of Which of the following are valid stream...

Question 19

When given the following command line. echo "foo bar" | tee bar | cat Which of the following output is created?
A) cat
B) foo bar
C) tee bar
D) bar
E) foo

Accepted Answer

The command `echo "foo bar" | tee bar | cat` outputs "foo bar" to both the terminal and the file named "bar". The `cat` command then outputs "foo bar" to the terminal.

Question 20

Which type of filesystem is created by mkfs when it is executed with the block device name only and without any additional parameters?
A) ext2
B) ext3
C) ext4
D) XFS
E) VFAT

Accepted Answer

ext2 is the default filesystem type created by mkfs when it is executed with the block device name only and without any additional parameters.

Exam 1: Linux Foundation Certified System Administrator

Which of the following commands can be used to search for the executable file foo when it has been placed in a directory not included in $PATH?

Which of the following signals is sent to a process when the key combination CTRL+C is pressed on the keyboard?

Which of the following is the device file name for the second partition on the only SCSI drive?

Which of the following commands will print the last 10 lines of a text file to the standard output?

In order to display all currently mounted filesystems, which of the following commands could be used? (Choose TWO correct choices.)

Which of the following command sets the Bash variable named TEST with the content FOO?

Which of the following commands makes /bin/foo executable by everyone but writable only by its owner?

Which of the following commands will reduce all consecutive spaces down to a single space?

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

Which character, added to the end of a command, runs that command in the background as a child process of the current shell?

What happens after issuing the command vi without any additional parameters?

Which of the following commands can be used to locate programs and their corresponding man pages and configuration files?

Which of the following commands changes the ownership of file.txt to the user dan and the group staff?

Regarding the command: nice -5 / usr /bin/prog Which of the following statements is correct?

When running the command sed -e "s/a/b/" /tmp/file >/tmp/file While /tmp/file contains data, why is /tmp/file empty afterwards?

Which of the following commands changes the number of days before the ext3 filesystem on /dev/sda1 has to run through a full filesystem check while booting?

When starting a program with the nice command without any additional parameters, which nice level is set for the resulting process?

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

When given the following command line. echo "foo bar" | tee bar | cat Which of the following output is created?

Which type of filesystem is created by mkfs when it is executed with the block device name only and without any additional parameters?