# Linux - Centos 7

Hi Everyone!

Black-coloured terminal with a lot of text in it used to make me feel very overwhelmed. Lately, I started to learn Linux and fire various commands to get rid of this fear and thought it would be a great idea to share some short notes and commands to get everyone on the same page started.

<mark>BASIC COMMANDS</mark>

1. **sudo, su** \- (the command may vary according to the flavour of Linux you are working on) - This command helps to fire commands that need root privileges.
    
2. **whoami** - gives you one-word user name that you have logged as.
    
3. **id** - gives you detailed information about the user you have logged as.
    
4. **groups** -prints the names of the primary and any supplementary groups for each given username.
    
5. **lastlog** - Provided details about the last logins in a detailed way.
    
6. **Clear** - too much happening on the terminal, this command clears the terminal giving you space to think clearly :-P
    

<mark>FILE &amp; DIRECTORY</mark>

1. **pwd** - (present working directory) - help you where are you currently located in files.
    
2. **ls** - (list) - command will help you get the list of files or subdirectories in the present working directory.
    
3. **cd** - (change directory) - to move inside the directory.
    
4. **cd ..** - you may want to come back to previous directories at times, so this command will move you one step back.
    
5. **cd /** - to go back to the root directory.
    
6. **mkdir &lt;filename&gt;** - to add a directory.
    
7. **rmdir &lt;filename&gt;** - to remove a directory.
    
8. **touch** - To add a file in the directory.
    

*Thanks for reading! :-)*