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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.
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)
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
| 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 |