# Day 3 : Basic Linux Command.

**#90DaysOfDevOps**

1. To view what's written in a file.
    
    ![](https://cdn.hashnode.com/res/hashnode/image/upload/v1698162149079/da7007b9-2665-4abe-92ad-50c012099f25.png align="center")
    
2. To change the access permissions of files.
    
    ![](https://cdn.hashnode.com/res/hashnode/image/upload/v1698162638644/a3f36de7-ce35-4b62-8c4d-e1e330512003.png align="center")
    
3. To check which commands you have run till now.
    
    ![](https://cdn.hashnode.com/res/hashnode/image/upload/v1698162743905/0a7c55d2-9b27-4202-8af9-0dc3985059a5.png align="left")
    
4. To remove a directory/ Folder.
    
    ![](https://cdn.hashnode.com/res/hashnode/image/upload/v1698162832561/2e8ee1a2-8ffd-4d65-b616-d294129cb6cb.png align="left")
    
5. To create a fruits.txt file and to view the content.
    
    ![](https://cdn.hashnode.com/res/hashnode/image/upload/v1698163047674/1cd3daea-b1a3-4919-a3f5-81ccc26126ad.png align="center")
    
    ![](https://cdn.hashnode.com/res/hashnode/image/upload/v1698163972505/4c4486be-6147-41e4-a567-cdac419d3119.png align="center")
    
6. Add content in devops.txt (One in each line) - Apple, Mango, Banana, Cherry, Kiwi, Orange, Guava.
    
    ![](https://cdn.hashnode.com/res/hashnode/image/upload/v1698164388216/d32667ba-299e-454b-93df-8c89343bee0f.png align="left")
    
7. Show only the top three fruits from the file.
    
    ![](https://cdn.hashnode.com/res/hashnode/image/upload/v1698164478804/e135411e-0fb6-42d2-ad16-dbd8c3436e89.png align="left")
    
8. Show only the bottom three fruits from the file.
    
    ![](https://cdn.hashnode.com/res/hashnode/image/upload/v1698164603710/9178b920-a1e7-40cb-b9af-e7c9b74e77e7.png align="left")
    
9. To create another file Colors.txt and to view the content.
    
    Add content in Colors.txt (One in each line) - Red, Pink, White, Black, Blue, Orange, Purple, and Grey.
    
    ![](https://cdn.hashnode.com/res/hashnode/image/upload/v1698164922322/9b644f08-349f-4de5-ba33-cd0ce3811629.png align="left")
    
10. To find the difference between fruits.txt and Colors.txt file.
    
    ![](https://cdn.hashnode.com/res/hashnode/image/upload/v1698165141765/b2ee0f6f-4ffc-4c8d-a661-81f2c8d4feba.png align="center")
    
    Thank you for reading! :)