I have gotten errors concerning the security and backport within the sources.list file. I entered all deb lines continuously from the command prompt up to the creation of the file since I wasn't sure if I could do a carriage return on each line you listed for the echo command. When I noticed the errors as a result of using the apt-get update command, I edited the sources.ist file so that each deb command was on its own line and I removed the backslash I though you accidentally omitted for the security.
I get the following errors:
W: GPG error:
http://security.ubuntu.com gutsy-
security Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 40976EAF437D05B5
W: GPG error:
http://security.ubuntu.com gutsy-
updates Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 40976EAF437D05B5
W: GPG error:
http://security.ubuntu.com gutsy Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 40976EAF437D05B5
W: GPG error:
http://security.ubuntu.com gutsy-
backports Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 40976EAF437D05B5
W: You may want to run apt-get update to correct these problems
I did rerun apt-get update but this did nothing.
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