change permission of all files in a folder linux code example

Example 1: chmod folder recursive

chmod -R MODE DIRECTORY

#Example
chmod -R 755 /var/www/html

Example 2: change the permissions of a folder in linux

sudo chmod -R 757 <file>

Example 3: how to change permission of a folder linux

chmod 777 foldername 
#will give read, write, and execute permissions for everyone.