I tried updating opkg.
This is the ouput. What does that error mean?
root@Omega-08ED:/# 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 passed.
Downloading http://downloads.openwrt.org/chaos_calmer/15.05/ar71xx/generic/packages/onion/Packages.gz.
Downloading http://downloads.openwrt.org/chaos_calmer/15.05/ar71xx/generic/packages/onion/Packages.sig.
Signature check failed.
Remove wrong Signature file.
Collected errors:
\* opkg_download: Failed to download http://downloads.openwrt.org/chaos_calmer/15.05/ar71xx/generic/packages/onion/Packages.gz, wget returned 8.
\* opkg_download: Failed to download http://downloads.openwrt.org/chaos_calmer/15.05/ar71xx/generic/packages/onion/Packages.sig, wget returned 8.