1、登录账户或切换账户时出现以下警告 ，如图
-bash: warning: setlocale: LC_CTYPE: cannot change locale (en US.UTF-8):no such file or directoty
-bash: warning: setlocale: LC_COLLATE: cannot change locale (en US.UTF-8):no such file or directoty
-bash: warning: setlocale: LC_MESSAGES: cannot change locale (en US.UTF-8):no such file or directoty
-bash: warning: setlocale: LC_NUMERIC: cannot change locale (en US.UTF-8):no such file or directoty
-bash: warning: setlocale: LC_TIME: cannot change locale (en US.UTF-8):no such file or directoty
实际上并非中文英文的问题，解决方法：vi /etc/environment，在文件里添加两行这个东西：
LANG=en_US.utf-8
LC_ALL=en_US.utf-8
保存退出，重启系统使environment文件生效（暂时好像只有重启系统才能使这个文件生效），重新登录，问题解决