can you tell me how can I fix below mentioned issue?
Code:
edwin@doomhammer:~$ sudo apt-get update
Ign cdrom://Ubuntu 10.04 LTS _Lucid Lynx_ - Release i386 (20100429)/ lucid/main Translation-en_US
Ign cdrom://Ubuntu 10.04 LTS _Lucid Lynx_ - Release i386 (20100429)/ lucid/restricted Translation-en_US
Hit http://download.virtualbox.org lucid Release.gpg
Get:1 http://security.ubuntu.com lucid-security Release.gpg [189B]
Ign http://security.ubuntu.com/ubuntu/ lucid-security/main Translation-en_US
Get:2 http://us.archive.ubuntu.com lucid Release.gpg [189B]
Ign http://us.archive.ubuntu.com/ubuntu/ lucid/main Translation-en_US
Ign http://download.virtualbox.org/virtualbox/debian/ lucid/non-free Translation-en_US
Ign http://security.ubuntu.com/ubuntu/ lucid-security/restricted Translation-en_US
Ign http://security.ubuntu.com/ubuntu/ lucid-security/universe Translation-en_US
Ign http://security.ubuntu.com/ubuntu/ lucid-security/multiverse Translation-en_US
Get:3 http://security.ubuntu.com lucid-security Release [32.5kB]
Err http://security.ubuntu.com lucid-security Release
Hit http://download.virtualbox.org lucid Release
Hit http://download.virtualbox.org lucid/non-free Packages
Ign http://us.archive.ubuntu.com/ubuntu/ lucid/restricted Translation-en_US
Ign http://us.archive.ubuntu.com/ubuntu/ lucid/universe Translation-en_US
Ign http://us.archive.ubuntu.com/ubuntu/ lucid/multiverse Translation-en_US
Get:4 http://us.archive.ubuntu.com lucid-updates Release.gpg [189B]
Ign http://us.archive.ubuntu.com/ubuntu/ lucid-updates/main Translation-en_US
Ign http://us.archive.ubuntu.com/ubuntu/ lucid-updates/restricted Translation-en_US
Ign http://us.archive.ubuntu.com/ubuntu/ lucid-updates/universe Translation-en_US
Ign http://us.archive.ubuntu.com/ubuntu/ lucid-updates/multiverse Translation-en_US
Get:5 http://us.archive.ubuntu.com lucid Release [57.2kB]
Err http://us.archive.ubuntu.com lucid Release
Get:6 http://us.archive.ubuntu.com lucid-updates Release [38.5kB]
Hit http://archive.canonical.com lucid Release.gpg
Ign http://archive.canonical.com/ubuntu/ lucid/partner Translation-en_US
Err http://us.archive.ubuntu.com lucid-updates Release
Hit http://archive.canonical.com lucid Release
Hit http://archive.canonical.com lucid/partner Packages
Get:7 http://dl.google.com stable Release.gpg [189B]
Ign http://dl.google.com/linux/deb/ stable/main Translation-en_US
Get:8 http://dl.google.com stable Release [2,540B]
Get:9 http://dl.google.com stable/main Packages [904B]
Fetched 4,203B in 13s (316B/s)
Reading package lists... Done
W: A error occurred during the signature verification. The repository is not updated and the previous index files will be used.GPG error: http://security.ubuntu.com lucid-security Release: The following signatures were invalid: BADSIG 40976EAF437D05B5 Ubuntu Archive Automatic Signing Key <ftpmaster@ubuntu.com>
W: A error occurred during the signature verification. The repository is not updated and the previous index files will be used.GPG error: http://us.archive.ubuntu.com lucid Release: The following signatures were invalid: BADSIG 40976EAF437D05B5 Ubuntu Archive Automatic Signing Key <ftpmaster@ubuntu.com>
W: A error occurred during the signature verification. The repository is not updated and the previous index files will be used.GPG error: http://us.archive.ubuntu.com lucid-updates Release: The following signatures were invalid: BADSIG 40976EAF437D05B5 Ubuntu Archive Automatic Signing Key <ftpmaster@ubuntu.com>
W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/lucid-security/Release
W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/lucid/Release
W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/lucid-updates/Release
W: Some index files failed to download, they have been ignored, or old ones used instead.
edwin@doomhammer:~$ sudo apt-get update > error
W: A error occurred during the signature verification. The repository is not updated and the previous index files will be used.GPG error: http://us.archive.ubuntu.com lucid Release: The following signatures were invalid: BADSIG 40976EAF437D05B5 Ubuntu Archive Automatic Signing Key <ftpmaster@ubuntu.com>
W: A error occurred during the signature verification. The repository is not updated and the previous index files will be used.GPG error: http://us.archive.ubuntu.com lucid-updates Release: The following signatures were invalid: BADSIG 40976EAF437D05B5 Ubuntu Archive Automatic Signing Key <ftpmaster@ubuntu.com>
W: A error occurred during the signature verification. The repository is not updated and the previous index files will be used.GPG error: http://security.ubuntu.com lucid-security Release: The following signatures were invalid: BADSIG 40976EAF437D05B5 Ubuntu Archive Automatic Signing Key <ftpmaster@ubuntu.com>
W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/lucid/Release
W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/lucid-security/Release
W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/lucid-updates/Release
W: Some index files failed to download, they have been ignored, or old ones used in
Well got the above mentioned problem after doing clean install of ubuntu 10.04.
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