Day 3 - Basic Linux commands

Task: What is the linux command to

1. To view what's written in a file.

   $ cat <filename.txt>

   

2. To change the access permissions of files.

   $ sudo chmod g+rwx <filename>

   

3. To check which commands you have run till now.

   $ history

4. To remove a directory/ Folder.

   $ rm -rf <foldername>

   

5. To create a fruits.txt file and to view the content.

   $ vim fruits.txt

   # creates a fruits.txt file and takes you to the editor, press i to enter into edit mode and write the content. Save it by esc and :wq! enter

   $ cat fruits.txt

6. # prints the content from fruits.txt

   

7. Add content in devops.txt (One in each line) - Apple, Mango, Banana, Cherry, Kiwi, Orange, Guava.

8. To Show only top three fruits from the file.

9. To Show only bottom three fruits from the file.

   $ vim devops.txt

   $ cat devops.txt

   $ head -n 3 devops.txt

   $ tail -n 3 devops.txt

   

10. To create another file Colors.txt and to view the content.

    

11. Add content in Colours.txt (One in each line) - Red, Pink, White, Black, Blue, Orange, Purple, Grey.

    $ vim colours.txt

    $ cat colours.txt

    

12. To find the difference between fruits.txt and Colours.txt file.

    $ diff fruits.txt colours.txt

13. 

Reference: https://www.linkedin.com/pulse/linux-commands-devops-used-day-to-day-activit-chetan-/