I have a TP-Link router. TL-WDR4300. I have setup OpenWrt environment in it.
Version details is as follows:
Linux version 4.4.14 (alex@AlexPC) (gcc version 5.3.0 (OpenWrt GCC 5.3.0 50108) )
I used the following command
root@OpenWrt:~# opkg update
Downloading "http"://downloads.openwrt.org/snapshots/trunk/ar71xx/generic/packages/base/Packages.gz.
Downloading "http"://downloads.openwrt.org/snapshots/trunk/ar71xx/generic/packages/base/Packages.sig.
Signature check failed.
Remove wrong Signature file.
Downloading "http"://downloads.openwrt.org/snapshots/trunk/ar71xx/generic/packages/kernel/Packages.gz.
Downloading "http"://downloads.openwrt.org/snapshots/trunk/ar71xx/generic/packages/kernel/Packages.sig.
Signature check failed.
Remove wrong Signature file.
Downloading "http"://downloads.openwrt.org/snapshots/trunk/ar71xx/generic/packages/luci/Packages.gz.
Downloading "http"://downloads.openwrt.org/snapshots/trunk/ar71xx/generic/packages/luci/Packages.sig.
Signature check failed.
Remove wrong Signature file.
Downloading "http"://downloads.openwrt.org/snapshots/trunk/ar71xx/generic/packages/management/Packages.gz.
Downloading "http"://downloads.openwrt.org/snapshots/trunk/ar71xx/generic/packages/management/Packages.sig.
Signature check failed.
Remove wrong Signature file.
Downloading "http"://downloads.openwrt.org/snapshots/trunk/ar71xx/generic/packages/packages/Packages.gz.
Downloading "http"://downloads.openwrt.org/snapshots/trunk/ar71xx/generic/packages/packages/Packages.sig.
Signature check failed.
Remove wrong Signature file.
Downloading "http"://downloads.openwrt.org/snapshots/trunk/ar71xx/generic/packages/routing/Packages.gz.
Downloading "http"://downloads.openwrt.org/snapshots/trunk/ar71xx/generic/packages/routing/Packages.sig.
Signature check failed.
Remove wrong Signature file.
Downloading "http"://downloads.openwrt.org/snapshots/trunk/ar71xx/generic/packages/telephony/Packages.gz.
Downloading "http"://downloads.openwrt.org/snapshots/trunk/ar71xx/generic/packages/telephony/Packages.sig.
Signature check failed.
Remove wrong Signature file.
Collected errors:
* opkg_download: Failed to download "http"://downloads.openwrt.org/snapshots/trunk/ar71xx/generic/packages/base/Packages.gz, wget returned 8.
* opkg_download: Failed to download "http"://downloads.openwrt.org/snapshots/trunk/ar71xx/generic/packages/base/Packages.sig, wget returned 8.
* opkg_download: Failed to download "http"://downloads.openwrt.org/snapshots/trunk/ar71xx/generic/packages/kernel/Packages.gz, wget returned 8.
* opkg_download: Failed to download "http"://downloads.openwrt.org/snapshots/trunk/ar71xx/generic/packages/kernel/Packages.sig, wget returned 8.
* opkg_download: Failed to download "http"://downloads.openwrt.org/snapshots/trunk/ar71xx/generic/packages/luci/Packages.gz, wget returned 8.
* opkg_download: Failed to download "http"://downloads.openwrt.org/snapshots/trunk/ar71xx/generic/packages/luci/Packages.sig, wget returned 8.
* opkg_download: Failed to download "http"://downloads.openwrt.org/snapshots/trunk/ar71xx/generic/packages/management/Packages.gz, wget returned 8.
* opkg_download: Failed to download "http"://downloads.openwrt.org/snapshots/trunk/ar71xx/generic/packages/management/Packages.sig, wget returned 8.
* opkg_download: Failed to download "http"://downloads.openwrt.org/snapshots/trunk/ar71xx/generic/packages/packages/Packages.gz, wget returned 8.
* opkg_download: Failed to download "http"://downloads.openwrt.org/snapshots/trunk/ar71xx/generic/packages/packages/Packages.sig, wget returned 8.
* opkg_download: Failed to download "http"://downloads.openwrt.org/snapshots/trunk/ar71xx/generic/packages/routing/Packages.gz, wget returned 8.
* opkg_download: Failed to download "http"://downloads.openwrt.org/snapshots/trunk/ar71xx/generic/packages/routing/Packages.sig, wget returned 8.
* opkg_download: Failed to download "http"://downloads.openwrt.org/snapshots/trunk/ar71xx/generic/packages/telephony/Packages.gz, wget returned 8.
* opkg_download: Failed to download "http"://downloads.openwrt.org/snapshots/trunk/ar71xx/generic/packages/telephony/Packages.sig, wget returned 8