| Command | Description |
| sudo su | which means we are in root user |
| ls | List all the contents of the directory |
| ls -l | long listing |
| ls -h | listing in human readable format |
| date | displays the current date |
| cal | Displays the Calendar |
| echo | It prints the content after this |
| cat | Opens the content of the file or Writing |
| rm | remove |
| rm -i | i used for confirmation |
| cp | copy the file |
| man | manual which helps to get details about the commands |
| history | shows the complete history of the command till now |
| alias | you can set alternate command |
| uptime | check the system since when its up |
| whoami | current user details |
| username | name of the system |
| q + Esc + control (c or d) | all these used to quite the executing or command |
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