Let's Discuss some more questions on Linux

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

    cat file_name
   

2. To change the access permissions of files.

    chmod permission_code file_name
   

   permission_code :

   1. Read: 4

   2. Write: 2

   3. Execute: 1

\=> Users:Groups: Others

For Ex: chmod 700 file.sh

The above command means that users have all the 3 permissions (i.e. read, write, execute) on the other hand groups, and others have no permissions.

1. To check which commands you have run till now

    history
   

2. To remove a directory/ Folder

    rm -r folder_name
   

   -r = recursively (used if the folder is not empty)

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

    vim fruits.txt
    cat fruits.txt
   

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

    echo "Apple" > devops.txt 
    echo "Mango" >> devops.txt 
    echo "Banana" >> devops.txt 
    echo "Cherry" >> devops.txt 
    echo "Kiwi" >> devops.txt 
    echo "Orange" >> devops.txt 
    echo "Guava" >> devops.txt
   

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

    head -n 3 devops.txt
   

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

    tail -n 4 devops.txt
   

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

    touch Colors.txt
    cat Colors.txt
   

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

   echo "Red" > Colors.txt
   echo "Pink" >> Colors.txt 
   echo "White" >> Colors.txt
   echo "Black" >> Colors.txt
   echo "Blue" >> Colors.txt
   echo "Orange" >> Colors.txt
   echo "Purple" >> Colors.txt
   echo "Grey" >> Colors.txt
   

9. To find the difference between the fruits.txt and Colors.txt file

   diff fruits.txt Colors.txt