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Command	Description	Heading
awk	The *awk* command is used to scan each input file for lines that match any of a set of patterns
pwd	The *pwd* command is used to show the path of the current directory	print working directory
cd	The cd command is used to change the current working directory	change directory
ls	The ls command is used to list directory contents
cal	The *cal* command is used to display a calendar of the current month or a specific month and year.	calendar
cat	The *cat* command is used to print (show) files
cp	The cp command is used to copy files or/and directories	copy
mv	The mv command is used to move (or rename) files or/and directories	move
mkdir	The *mkdir* command allows users to create or make new directories	make directory
rm	The rm command is used to remove objects such as files, directories and symbolic links	remove
touch	The *touch* command is used to change file access, change and modify timestamps of a file	touch file
locate	The *locate* command is used to quickly find filenames and directories
find	The *find* command is used to locate files based on some specific criteria and either prints or performs another action as requested
file	The *file* command is used to determine the type of a file
grep	The *grep* command is for searching plain-text data sets for lines that match a regular expression	file pattern searcher
sed	The *sed* command is used for text processing
sort	The *sort* command is to sort or merge records (lines) of text and binary files
sudo	The *sudo* command is generally used as a prefix of some command that only superuser is allowed to run
su	The su command is used to switch to another user or the root	substitute user identity
df	The df command displays disk space usage and other elements of the file system	short for disk free
du	The du command displays the number of blocks used for files
head	The *head* command is used to display first lines of a file (header)
hostnamectl	The *hostnamectl* command is used to query and change the Linux system hostname and related settings
tail	The *tail* command is used to display the last parts of a file (footer)
diff	The *diff* command is used to compare two files line by line and display the difference between them
tar	The *tar* command is used to compress a group of files into an archive.
zip	The *zip* is a compression and file packaging utility for Unix
unzip	The *unzip* command extracts files from the specific ZIP archive
chmod	The *chmod* command is used to change file modes (permissions) of a file or directory
chown	The *chown* is used to change owner, change the user or/and group ownership of each given file
jobs	The *jobs* is a shell built-in command used to list the jobs that are running in the background and in the foreground
ps	The ps command displays the currently-running processes	process status
kill	The *kill* is a command used to terminate or send signals to running processes	kill process_id_#
passwd	The *passwd* is a command used to change user's password	passwd username
ping	The *ping* is a command used to troubleshoot and diagnose network connectivity issues	ping hostname
wget	The *wget* is used to retrieve contents from the server. It is a non-interactive network downloader	Its name derives from “World Wide Web” and “get”
uname	The *uname* is a command to show the CPU architecture, hostname, and the version of the kernel of the kernel running on the system	unix name
uniq	The *uniq* is a command to report or filter out repeated lines in a file	unique
top	The *top* command is used to display and update information about the top CPU processes
history	The *history* command is used to display history of all (executed) commands
man	The *man* is used to display online manual documentation pages	manual
echo	The *echo* is used to display line or text/string that are passed as an argument	write arguments to the standard output
hostname	The *hostname* is a command to set or print name of current host system	*hostnamectl* for Linux
useradd	The *useradd* is a command to add user accounts to your system
userdel	The *userdel* is a command to delete user accounts
w	The w command is to view who is logged in and what they are currently doing
wc	The wc command is used to count the number of lines, words, and characters in a file or input.

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