Chu's Space

Debian 新系统更新时，有提示:

Get:8 http://security.debian.org wheezy/updates/non-free Translation-en [14 B] 
Hit http://ftp.debian.org wheezy/contrib i386 Packages                         
Hit http://ftp.debian.org wheezy/non-free i386 Packages                   
Hit http://ftp.debian.org wheezy/contrib Translation-en
Hit http://ftp.debian.org wheezy/main Translation-en
Hit http://ftp.debian.org wheezy/non-free Translation-en
Fetched 729 kB in 2s (350 kB/s)              
Reading package lists... Done
W: There is no public key available for the following key IDs:
9D6D8F6BC857C906
W: There is no public key available for the following key IDs:
7638D0442B90D010

解决办法：

apt-get install debian-keyring debian-archive-keyring

参考资料：http://unix.stackexchange.com/questions/75807/no-public-key-available-on-apt-get-update