BADSIG error with apt-get update

Question

Whenever I use the command sudo apt-get update I get the following error:

W: GPG error: http://archive.ubuntu.com trusty Release: The following signatures were invalid: BADSIG 40976EAF437D05B5 Ubuntu Archive Automatic Signing Key <ftpmaster@ubuntu.com>

Please help me I am very new to all this.

score 1 · Accepted Answer · answered Jan 21 '18 at 10:45

1

Grabbing the missing keys

sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 40976EAF437D05B5

Rebuild software cache

cd /var/lib/apt
sudo mv lists lists.old
sudo mkdir -p lists/partial
sudo apt-get clean
sudo apt-get update

Hope this answer your problem :)

answered Jan 21 '18 at 10:45

shalih.ai

348

I've tried this but doesn't seem to help – Sahil Silare Jan 21 '18 at 11:07
What's the error that appears when you type those commands? – shalih.ai Jan 21 '18 at 14:17
mv: cannot move ‘lists’ to ‘lists.old/lists’: Directory not empty – Sahil Silare Jan 25 '18 at 16:41
After you command cd /var/lib/apt, enter command sudo su, then follow with the command above without sudo. – shalih.ai Jan 28 '18 at 11:05

BADSIG error with apt-get update

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