解决OpenWrt opkg出现Signature check failed

最近在折腾使用软路由，opkg手工安装一些插件时遇到了些小问题，opkg update升级失败，提示错误信息，现将解决方案记录如下。

问题描述：OpenWrt无法opkg update更新，更新出现“Signature check failed. Remove wrong Signature file.”的错误提示。

问题情况：

[email protected]:/tmp# opkg update
Downloading http://downloads.openwrt.org/chaos_calmer/15.05/ar71xx/generic/packages/base/Packages.gz
Updated list of available packages in /var/opkg-lists/chaos_calmer_base.
Downloading http://downloads.openwrt.org/chaos_calmer/15.05/ar71xx/generic/packages/base/Packages.sig
Signature check failed.
Remove wrong Signature file.
Downloading http://downloads.openwrt.org/chaos_calmer/15.05/ar71xx/generic/packages/luci/Packages.gz
Updated list of available packages in /var/opkg-lists/chaos_calmer_luci.
Downloading http://downloads.openwrt.org/chaos_calmer/15.05/ar71xx/generic/packages/luci/Packages.sig
Signature check failed.
Remove wrong Signature file.
…………
[email protected]:/tmp#

以上网址都可以在浏览器正常打开，正常下载。

http://downloads.openwrt.org/chaos_calmer/15.05/ar71xx/generic/packages/base/Packages.gz
http://downloads.openwrt.org/chaos_calmer/15.05/ar71xx/generic/packages/base/Packages.sig

解决方案：登陆OpenWrt，系统，OPKG 配置，将option check_signature注释掉。