uninstall packages cleanly

How to fix the issure that being stuck in a login loop after uninstallation with command
sudo apt-get remove _YOUR-PACKAGE-NAME_

A) Fix the boot loop first:

(if there is a login loop issure: after typing password the screen goes back and then redirects user back to the unity login page)

1. at login screen type Ctrl + Alt + F1 ( or F2 .. F6)

2. Enter a terminal in full black screen. From there install YOUR-PACKAGE-NAME AGAIN by

   sudo apt-get install YOUR_PACKAGE_NAME
   

3. Go back to the normal login screen and now log in into your account

B) Uninstall PACKAGE cleanly:

1. Refer to this manual with Google translator

2. Open terminal again and you only need following commands:

sudo dpkg -l intial_letter_of_your_package* (like sogoupinyin you should type in so* here)

sudo apt-get purge package_name_from_the_list
 
sudo apt-get autoremove

1. Restart your computer