Crashplan for Dummies, aka Step by Step :)

As I am currently evaluating both Crashplan and SpiderOak, here are the procedures for getting both of them updated in the source lists. In the interest of full disclosure, I have not yet downloaded and tested the SpiderOak packages, and I am NOT an experienced Linux user. Just thought everyone might find this procedure useful for getting to the point where downloading both packages is simple:

1. Log in via SSH client. (I use PuTTY)

2. Edit /etc/apt/sources.list with either vi or nano
"vi /etc/apt/sources.list"
or
"nano /etc/apt/sources.list"

3. Add the following lines to the file:
"deb http://archive.debian.org/debian etch main"
"deb http://archive.debian.org/debian-backports etch-backports main non-free"
"deb http://apt.spideroak.com/debian/ stable non-free"

4. Save the file

5. Enter "apt-get update"

6. At the end of the update, you'll get the following error message (although the public key might be different):
W: GPG error: http://apt.spideroak.com stable Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 5D654504F1A41D5E
W: You may want to run apt-get update to correct these problems

7. To correct this issue, you'll need to get the public key and install it. To do so, enter the following:
"gpg --keyserver http://apt.spideroak.com/spideroak-apt-pubkey.asc --recv-keys 5D654504F1A41D5E" (where the public key must match the one received above)

8. If successful, you will see the following:
gpg: requesting key F1A41D5E from http server apt.spideroak.com
gpg: /root/.gnupg/trustdb.gpg: trustdb created
gpg: key F1A41D5E: public key "SpiderOak Apt Repository <apt@spideroak.com>" imported
gpg: Total number processed: 1
gpg: imported: 1

9. Finally, add it by entering the following:
"gpg -a --export 5D654504F1A41D5E | sudo apt-key add -"

10. If successful, you will see the following:
"OK"

11. Now, you can update again:
"apt-get update"

12. A successful update will look like this (assuming you entered both Crashplan and Spideroak into your source.lists file):

Hit http://www.readynas.com 4.2.21/ Release.gpg
Get:1 http://apt.spideroak.com stable Release.gpg [189B]
Ign http://apt.spideroak.com stable/non-free Translation-en_US
Ign http://www.readynas.com 4.2.21/ Translation-en_US
Hit http://apt.spideroak.com stable Release
Hit http://www.readynas.com 4.2.21/ Release
Hit http://archive.debian.org etch Release.gpg
Ign http://archive.debian.org etch/main Translation-en_US
Hit http://archive.debian.org etch-backports Release.gpg
Ign http://apt.spideroak.com stable/non-free Packages/DiffIndex
Ign http://www.readynas.com 4.2.21/ Packages/DiffIndex
Hit http://apt.spideroak.com stable/non-free Packages
Ign http://archive.debian.org etch-backports/main Translation-en_US
Ign http://archive.debian.org etch-backports/non-free Translation-en_US
Hit http://archive.debian.org etch Release
Hit http://www.readynas.com 4.2.21/ Packages
Hit http://archive.debian.org etch-backports Release
Ign http://archive.debian.org etch/main Packages/DiffIndex
Ign http://archive.debian.org etch-backports/main Packages/DiffIndex
Ign http://archive.debian.org etch-backports/non-free Packages/DiffIndex
Hit http://archive.debian.org etch/main Packages
Hit http://archive.debian.org etch-backports/main Packages
Hit http://archive.debian.org etch-backports/non-free Packages
Fetched 189B in 2s (84B/s)
Reading package lists... Done