how to give full permission to a file in linux code example

Example 1: linux give permission to folder

sudo chmod -R a+rwx /path/to/folder

Example 2: debian give write permission

sudo chmod -R 757 /var/www

Example 3: how to set execute permission in linux

chmod -x script-name-here.sh #Change the "script-name-here" to the name of your .sh file.