Update command error and warning

when i run sudo apt-get update, i found below errors on terminal, please help me!

Err trusty Release

Fetched 3.183 kB in 13s (229 kB/s)
Reading package lists... Done W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: trusty Release: The following signatures were invalid: BADSIG 16126D3A3E5C1192 Ubuntu Extras Archive Automatic Signing Key

W: Failed to fetch http://id.archive.ubuntu.com/ubuntu/dists/trusty/Release

W: Some index files failed to download. They have been ignored, or old ones used instead.

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Category: 14.04 Time: 2016-07-30 Views: 0
Tags: 14.04

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