Ubuntu14.10 use of notebooks

Issue: The red triangle exclamation mark in Ubuntu upper right corner warns you that the update information has expired the updated information is outdated.

Reference: http://www.cnblogs.com/xuxiang/archive/2013/06/14/3136917.html

This article comes from http://blog.csdn.net/zcube/article/details/42246283

Solution:
First remove all items from the other software (other software), software and Updates (software&updates), system settings, and then execute the following command:

1, sudo rm-rf/var/lib/apt/lists (delete lists folder)
2. Sudo mkdir/var/lib/apt/lists (Create new lists folder)
3. Sudo apt-get update (update source)

Practice in person:

This is a solution, but a better approach is to choose a reliable and stable source, after all, warning that the following text has described the problem clearly.

Ubuntu14.10 use of notebooks