The installed Wattos English system is converted to a Chinese system

1.  Click and open: "System Icon" ----> "Preferences" ----> "Language Surpport" to open the language format setting dialog box

2.  Hold down the left mouse button and drag "Chinese (China)" to the front of "English (United States)"

 

3, Click "Apply System-Wide"

 

4, After logging out, log in again.

 

http://blog.csdn.net/liumang_d/article/details/3899462

The difference between /dev/null and /dev/zero

 

/dev/null, nicknamed the bottomless pit, you can output any data to it, it takes all, and will not hold on!
/dev/zero, is an input device that you can use to initialize files. https://wiki.shileizcc.com/display/shell/DD http://irw.ncut.edu.tw/peterju/linux.html http://www.freeoa.net/osuport/sysadmin/linux-use- skill-sets_1561.html