In Lab 1, I will show the following commands:
a. df
b. cal
c. free
d. cd
e. pwd
f. ls
g. file
h. less

A) df

The df command is used to show the amount of disk space that is free on file systems.

B) cal

The cal command is used to show the calendar in the operating system’s UI.

C) free

The free command display RAM details in Linux machine.

D) cd

The cd command is used to change the current working directory in an operating system.

E) pwd

The pwd command is used to output the path of the current working directory.

F) ls

the ls command is used to list files in Unix and Unix-like operating systems.

G) file

The file command is a standard program for recognizing the type of data contained in a computer file.

H) less

The less command is a terminal pager program on Unix systems used to view (but not change) the contents of a text file one screen at a time.