santoshstha/basic.csv

	COMMAND	FUNCTIONALITY
	ls	Lists all files and directories in the present working directory
	ls -R	Lists files in sub-directories as well
	ls -a	Lists hidden files as well
	ls -al	Lists files and directories with detailed information.
	ls 'path' \| more	Show listing one screen at a time
	cd or cd ~	Navigate to HOME directory
	cd ..	Move one level up
	cd	To change to a particular directory
	cd /	Move to the root directory
	cp 'file1' 'file2'	Copy file1 to file2
	cp -r 'dir1' 'dir2'	Copy directory and all subdirs recursively
	cat 'newfile' >> 'oldfile'	Append newfile to end of oldfile
	mv 'oldfile' 'newfile'	Rename/Move a file
	diff 'file1' 'file2'	Show the differences between 2 files
	sdiff 'file1' 'file2'	Show the differences between 2 files side by side
	chown user	For changing the ownership of a file/directory
	chown user:group filename	Change the user as well as group for a file or directory
	cat > filename	Creates a new file
	cat filename	Displays the file content
	cat file1 file2 > file3	Joins two files file1 and file2 and stores the output in a new file file3
	grep 'pattern' 'file'	Find regular expression in file.
	spell 'file'	Display misspelled words.
	wc 'file'	Count words in file.
	wc -l 'file'	Count the number of lines in a file.
	VARIABLE_NAME= variable_value	Create a new variable with a value assigned
	echo $VARIABLE	To display the value of a variable
	mv file new_file_path	Moves the files to the new location
	mv filename new_file_name	Renames the file to a new filename
	sudo	Allows regular users to run programs with the security privileges of the superuser or root
	rm filename	Deletes a file
	rm -r 'dirname'	Remove all files and subdirectories
	man	Gives help information on a command
	history	Gives a list of all past commands typed in the current terminal session
	clear	Clears the terminal
	mkdir directoryname	Creates a new directory in the present working directory or at the specified path
	rmdir	Deletes a directory
	mv	Renames a directory
	pr -x	Divides a file into x columns
	pr -h	Assigns a header to a file
	pr -n	Denotes a file with Line Numbers
	lp -nc or lpr c	Prints 'c' number of copies of a File
	lp-d or lp-P	Specifies name of the printer
	apt-get	Command used to install and update packages
	mail -s 'subject -c 'cc-address' -b 'bcc-address' 'to-address'	Command to send email
	mail -s 'Subject' to-address < Filename	Command to send email with attachment
	sudo adduser username	To add a new user
	sudo passwd -l 'username'	To change the password of a user
	sudo userdel -r 'username'	To remove a newly created user
	sudo usermod -a -G GROUPNAME USERNAME	To add a user to a group
	sudo deluser USER GROUPNAME	To remove a user from a group
	finger	Shows information of all the users logged in
	finger username	Gives information of a particular user
	SSH username@ip-address or hostname	login into a remote Linux machine using SSH
	ping 'hostname'	To ping and Analyzing network and host connections
	top	Details on all Active Processes
	ps	Give the status of processes running for a user
	ps PID	Gives the status of a particular process
	pidof	Gives the Process ID (PID) of a process
	kill PID	Kills a process