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When I do a sudo apt-get update, I encounter the following:

Fetched 189 B in 10s (18 B/s)                                                  
W: There is no public key available for the following key IDs:
1397BC53640DB551
W: GPG error: http://download.opensuse.org ./ Release: The following signatures were invalid: KEYEXPIRED 1436387333
W: Failed to fetch http://dl.google.com/linux/chrome/deb/dists/stable/Release  Unable to find expected entry 'main/binary-i386/Packages' in Release file (Wrong sources.list entry or malformed file)

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

What would be a good/recommended way to fix this?

1 Answers1

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Because the error was reduced based on the OP's previous response -- the following link should help: https://askubuntu.com/a/650051/382121 - Let us know if this resolves your issue Sandeep Chatterjee