What is the purpose of the file /etc/profile?
A. It contains the welcome message that is displayed after login.
B. It contains security profiles defining which users are allowed to log in.
C. It contains environment variables that are set when a user logs in.
D. It contains default application profiles for users that run an application for the first time.
題解
當使用者登入的時候，會執行「/etc/profile」設定檔來設定環境變數。