Ubuntu 20.04 commands for Beginners

date	Displays the current date and time of the system
cal	Displays the current month’s calendar
uptime	shows the uptime of the system
whoami	current user’s name
users	logged in user name
id	current user’s id
who
w
man	reference manual of other commands
ls	Lists Directory
cat	View whole File at once
more	View File page by page
less	View File page by page (Loads faster than more)
head	Display first 10 lines of a file
tail	Display last 10 lines of a file
wc -l	Count number of lines in a file