How to change folder and file permission in linux

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Linux is very secure os and many time you don’t have access to read or write folder and files. Sometimes when you want to install a local server like “xampp” or “Local” and You want to edit your project folder but you can’t create a new project in your xampp folder because the folder is secure and you can only watch the folder files. To change to permission you need to do this steps:

1. Open the linux terminal by type ctrl+al+T;
2. When you enter to the terminal you need to navigate to the folder, example if my folder(folder name:myfolder) exist in the desktop folder you need to write this comment: “cd /Desktop” .
3. Now you need to choose the permission you want to your folder by typing: “sudo chmod 777 myfolder”
4. The number 777 mean that the folder “myfolder” get full permission Read,Write,Execute. The First number is the user permission , the second number is the specific group permission and the third number is all other users in the group. (First number – 7 -User , Second number – 7 – group , Third number 7 – other users, 777)
5. The other option: number 1 – execute , number 2 – write , number 4 – read.
6. The number 7 is the all option – 1+2+4 = 7.
7. Example: If you want to give only read permission you type “sudo chmod 444 Tal”. (First number – 4 -User , Second number – 4 – group , Third number 4 – other users, 444).
8. Now after you change the type of the permission , you need to change who get to access the folder by typing this comment: “sudo chown tal:tal myfolder”. the first name “tal” after the word “chown” is my user name , the second tal is the group name.
9. You can give the permission to the root user and root group like this: “sudo chown root:root myfolder”.

This is very basic tutorial how to change permissions in linux os , if you want more info , you can show in this link: https://help.ubuntu.com/community/FilePermissions.