I am having some problems adding longview to a machine. I am running Debian 7.

I am getting this error ...

root@server:~# bash <four-letter-code>
Reading package lists... Done
Building dependency tree
Reading state information... Done
lsb-release is already the newest version.
lsb-release set to manually installed.
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
Failed to fetch https://apt-longview.linode.com/linode.gpg. Aborting install.
root@server:~# wget https://apt-longview.linode.com/linode.gpg
--2013-08-15 09:34:36--  https://apt-longview.linode.com/linode.gpg
Resolving apt-longview.linode.com (apt-longview.linode.com)... 97.107.139.216, 2600:3c03::4c
Connecting to apt-longview.linode.com (apt-longview.linode.com)|97.107.139.216|:443... connected.
ERROR: The certificate of `apt-longview.linode.com' is not trusted.
ERROR: The certificate of `apt-longview.linode.com' hasn't got a known issuer.

Any ideas?

There was an issue the way Apache was serving it's certificate chain. It was fine in most browsers and curl, but wget didn't seem to like it. That has been corrected at this time and looks to be working with wget again. If you have any further issues please let us know.

Regards,
Peter