How can I recursively apply chmod 777 to a folder and all its contents?

chmod 777Thus, 777 (111 111 111) is all permissions for everyone, while 700 (111 000 000) is all permissions only for the owner. Other combinations are also common: 666 (110 110 110) is777 means User, Group, and Others all have full read, write, and execute permissions. However, granting such permissions can pose a security risk.