chmod for directory code example

Example 1: how to make all directory 775

find /opt/lampp/htdocs -type d -exec chmod 755 {} \;
find /opt/lampp/htdocs -type f -exec chmod 644 {} \;

Example 2: change the permissions of a folder in linux

sudo chmod -R 757 <file>

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.