How to grant a folder with write permissions for installing gems in Ruby

Question

the biggest problem I have with installing anything on my computer related to Ruby and Rails, is not having 'write' permissions to a specific folder.

For example: "You don't have write permissions for the /Library/Ruby/Gems/2.0.0 directory"

Instead of always using Sudo command, which sometimes doesn't solve the problem, how can I give myself 'write' permissions?

Answer 1

sudo chmod 777 directory_name

它向用户授予所有权限。