用戶配置文件級別的：~/.profile
~/.profile: executed by the command interpreter for login shells.
This file is not read by bash(1), if ~/.bash_profile or ~/.bash_login exists.
see /usr/share/doc/bash/examples/startup-files for examples. The files are located in the bash-doc package.
The default umask is set in /etc/profile; for setting the umask for ssh logins, install and configure the libpam-umask package.