commands

Question 1

What does the command echo “HELLO -START OF EXECUTION OF LINUX/UNIX COMMANDS” do?

Answer 1

Prints the message to the terminal.

Marks the start of the command execution session.

Question 2

How does the command PS1=”\d \t \u@\h \#\$” customize the shell prompt?

Answer 2

Displays current date, time, username, hostname, command number, and prompt symbol.

Provides a more informative prompt.

Question 3

What is the purpose of the command pwd?

Answer 3

Prints the current working directory.

Question 4

What does the command ls do?

Answer 4

Lists files and directories in the current directory.

Question 5

What information does ls -la provide?

Answer 5

Lists all files/directories with detailed information.

Question 6

What does uname -r display?

Answer 6

The Linux kernel version.

Question 7

What is the output of uname -a?

Answer 7

Shows all system information.

Question 8

What does the command cat palindrome.c do?

Answer 8

Displays the contents of the file palindrome.c.

Question 9

What is the purpose of the command cp sum_avgl.c sa_list.c?

Answer 9

Copies sum_avgl.c to a new file sa_list.c.

Question 10

What does the command mkdir sphal accomplish?

Answer 10

Creates a directory named sphal.

Question 11

What does cd sphal do?

Answer 11

Changes the current directory to sphal.

Question 12

What is the purpose of the command mv f2.c f4.c?

Answer 12

Renames f2.c to f4.c.

Question 13

What does the command rm f5.c do?

Answer 13

Deletes the file f5.c.

Question 14

What does chmod 777 palindrome.c grant?

Answer 14

Full permissions to all users for palindrome.c.

Question 15

What does the command cat sum_avgl.c key_search.c > progall.c do?

Answer 15

Combines contents of two files into progall.c.

Question 16

What does more progall.c accomplish?

Answer 16

Displays progall.c page by page.

Question 17

What is the function of the command wc progall.c?

Answer 17

Counts lines, words, and characters in progall.c.

Question 18

What does the command find / -name passwd do?

Answer 18

Searches the entire filesystem for files named passwd.

Question 19

What does grep “stdio” progall.c search for?

Answer 19

Searches for the string ‘stdio’ in progall.c.

Question 20

What information does df -h provide?

Answer 20

Displays disk space usage in human-readable format.

Question 21

What does the command who do?

Answer 21

Lists logged-in users.

Question 22

What is the purpose of cat >> myteamlist?

Answer 22

Appends team member details to myteamlist.

Question 23

What does sort myteamlist accomplish?

Answer 23

Sorts myteamlist alphabetically.

Question 24

What does cat /proc/cpuinfo > infocpu do?

Answer 24

Saves CPU information to infocpu.

Question 25

What does the command `history` do?

Answer 25

Lists the command history.

Question 26

Fill in the blank: The command `touch emptyfile` creates an _______.

Answer 26

empty file named `emptyfile`.

Question 27

True or False: `tail -10 progall.c` displays the first 10 lines of `progall.c`.

Answer 27

False.

Question 28

What does `tail -5 infocpu` display?

Answer 28

Displays the last 5 lines of `infocpu`.

Question 29

What does `echo $PATH | more` do?

Answer 29

Displays the `PATH` environment variable paginated.

Question 30

What is the purpose of `head -1 progall.c`?

Answer 30

Shows the first line of `progall.c`.

Question 31

What does `cd ..` accomplish?

Answer 31

Moves to the parent directory.

Question 32

What information does `ps -la` provide?

Answer 32

Lists all processes with detailed information.

Question 33

What does the command `cal` do?

Answer 33

Shows the current month's calendar.

Question 34

What does `sort -r myteamlist` do?

Answer 34

Sorts `myteamlist` in reverse order.

Question 35

What does `echo “END OF SP LAB ASSIGNMENT 1 - GOOD BYE”` signify?

Answer 35

Marks the end of the session.