由于GPG错误(NODATA)无法更新Debian Wheezy

它的apt源文件有以下配置：

deb http://ftp.uk.debian.org/debian/ wheezy main non-free contrib
deb-src http://ftp.uk.debian.org/debian/ wheezy main non-free contrib

deb http://security.debian.org/ wheezy/updates main contrib non-free
deb-src http://security.debian.org/ wheezy/updates main contrib non-free

# wheezy-updates,previously known as 'volatile'
deb http://ftp.uk.debian.org/debian/ wheezy-updates main contrib non-free
deb-src http://ftp.uk.debian.org/debian/ wheezy-updates main contrib non-free

当我尝试更新时,我得到官方Debian存储库的GPG错误：

root@osgb:~# apt-get clean
root@osgb:~# apt-get update
Get:1 http://security.debian.org wheezy/updates Release.gpg                
Get:2 http://ftp.uk.debian.org wheezy Release.gpg
Get:3 http://ftp.uk.debian.org wheezy-updates Release.gpg                       
Get:4 http://security.debian.org wheezy/updates Release                                                                            
Ign http://security.debian.org wheezy/updates Release
E: GPG error: http://security.debian.org wheezy/updates Release: The following signatures were invalid: NODATA 1 NODATA 2

如果我从sources.listfile中删除安全存储库并再次尝试apt-get update,那么这次弹出的错误就是ftp.uk.debian.org

root@osgb:~# apt-get clean
root@osgb:~# apt-get update
Get:1 http://ftp.uk.debian.org wheezy Release.gpg
Get:2 http://ftp.uk.debian.org wheezy-updates Release.gpg                    
Get:3 http://ftp.uk.debian.org wheezy Release                                
Ign http://ftp.uk.debian.org wheezy Release                                     
E: GPG error: http://ftp.uk.debian.org wheezy Release: The following signatures were invalid: NODATA 1 NODATA 2

到目前为止我尝试过的是;

>试过其他一些镜子,
>尝试手动安装debian-keyring和debian-archive-keyring deb文件,
>通过创建部分文件夹,apt-get清理等删除/ var / lib / apt / lists和强制重新生成(在许多帖子中提供)

他们都没有帮助.

那么,这个错误是什么,即它是什么意思？你有什么想法解决它吗？

更新(2015年8月18日)：

服务器没有任何磁盘空间问题.它有一个单独的分区设置,有足够的空白空间：

root@osgb:~# df -h
Filesystem                                              Size  Used Avail Use% Mounted on
rootfs                                                  259G   22G  224G   9% /
udev                                                     10M     0   10M   0% /dev
tmpfs                                                   1.2G  240K  1.2G   1% /run
/dev/disk/by-uuid/b76a2c04-44b6-4a9e-bace-7286a67a0f8d  259G   22G  224G   9% /
tmpfs                                                   5.0M     0  5.0M   0% /run/lock
tmpfs                                                   4.6G     0  4.6G   0% /run/shm

更新(2015年8月20日)

正如所建议的那样,我尝试更新密钥,但似乎我的服务器已经有了最新的密钥.不幸的是,强大的NODATA错误仍然存??在.

root@osgb:~# apt-key update
gpg: key B98321F9: "Squeeze Stable Release Key <debian-release@lists.debian.org>" not changed
gpg: key 473041FA: "Debian Archive Automatic Signing Key (6.0/squeeze) <ftpmaster@debian.org>" not changed
gpg: key 65FFB764: "Wheezy Stable Release Key <debian-release@lists.debian.org>" not changed
gpg: key 46925553: "Debian Archive Automatic Signing Key (7.0/wheezy) <ftpmaster@debian.org>" not changed
gpg: key 518E17E1: "Jessie Stable Release Key <debian-release@lists.debian.org>" not changed
gpg: key 2B90D010: "Debian Archive Automatic Signing Key (8/jessie) <ftpmaster@debian.org>" not changed
gpg: key C857C906: "Debian Security Archive Automatic Signing Key (8/jessie) <ftpmaster@debian.org>" not changed
gpg: Total number processed: 7
gpg:              unchanged: 7
root@osgb:~# apt-get update
Get:1 http://ftp.uk.debian.org wheezy Release.gpg
Get:2 http://ftp.uk.debian.org wheezy-updates Release.gpg
Get:3 http://ftp.uk.debian.org wheezy Release                                
Ign http://ftp.uk.debian.org wheezy Release                                     
E: GPG error: http://ftp.uk.debian.org wheezy Release: The following signatures were invalid: NODATA 1 NODATA 2

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决议和最后的话：

我认为这不是防火墙问题,因为使用的端口是80,我可以手动连接.但是,检测到防火墙在应用程序级别阻止了服务器的请求.防火墙认为apt-get是一个可疑的应用程序被阻止,除非明确允许.我们将它添加到白名单中,它现在正常运行！