Welcome to the linux_course wiki!

Linux

Linux is an open-source operating system like other operating systems such as Microsoft Windows, Apple Mac OS, iOS, Google android, etc. An operating system is a software that enables the communication between computer hardware and software. It conveys input to get processed by the processor and brings output to the hardware to display it.

Linux OS

The Linux OS was developed by Linus Torvalds in 1991, which sprouted as an idea to improve the UNIX OS. He suggested improvements but was rejected by UNIX designers. Therefore, he thought of launching an OS, designed in a way that could be modified by its users. We can use Linux through an interactive user interface as well as from the terminal (Command Line Interface)

why we use Linux

Linux may be a perfect operating system if you want to get rid of viruses, malware, slowdowns, crashes, costly repairs, and many more. Further, it provides various advantages over other operating systems, and we don't have to pay for it

Linux command cheat sheet

Sr.no	Linux commands	description
1	pwd	Prints the present working directory path
2	cd	To change/shift the directory
3	ls	Display all the files and directories in a directory
4	mkdir	To create a directory
5	clear	To clear the terminal
6	rm	To remove/delete the files and directories
7	vim and gvim	Editors used to store the code/data
8	cat	Displays the file contents on the terminal
9	echo	prints the content (similar to printf in c)
10	head	Display the lines from starting
11	tail	Display the lines from ending
12	history	Displays the previous used commands
13	mv	Used to move a file to different path
14	cp	Used to copy a file
15	find	Searches all the files & directories from the current path specified
16	grep	Searches files or directories for a particular string/pattern
17	vimdiff	Used to open multiple editors at a timewhich shows difference between them
18	alias and unalias	Used to create a shortcut for a command
19	environmental variables	Variables which stores values & commands
20	df and du	Displays the disk space available & using
21	symbolic links	link which points to another files
22	ps	which displays the running process
23	kill	to kill a running process
24	whoami	Displays the username
25	passwd	used to change the password of an user
26	chmod	To change the permissions of a file or directory
27	sed	To replace text in all files from the terminal - TODO in a wiki page