Under Ubuntu, its practical C-Library is EGLIBC.
1. Check the current version
LDD--version
2. Update download
2.0: Replace the original source, and then update. sudo apt-get update
2.1: Download sudo apt-get source Libc6-dev
This will download the relevant compressed document to the current directory
2.2: Direct install update sudo apt-get install Libc6-dev
Install the Ubuntu system after the first thing is to replace the source of the update, because the system comes with a source of some in China can not access, access to the speed is particularly slow. Fortunately, some domestic companies and universities provide a good speed update source. For details on how to update the source, see the
Ubuntu 12.04 LTS How to use the faster update source "article
C Language Programming Basics------0.4.3 How to download eglibc and view versions under Ubuntu