我想使用我的 Launchpad PGP 密钥在两台计算机上访问我的 Launchpad PPA。为此，我需要将密钥传输到另一台 Ubuntu 计算机。到目前为止，我发现 Ubuntu 特定网站上的支持很少。
以下是我所做的事情original computer：
$ gpg2 --fingerprint
/home/ubuntu-xenial/user/.gnupg/pubring.kbx
--------------------------------------------
pub rsa2048/245FD525 2016-12-16 [SC]
Key fingerprint = C64F 728F BF5D C5CE 357B D1AE FC8F 1C1C 245F D525
uid [ unknown] my_name <my_e-mail>
sub rsa2048/4D0AABD3 2016-12-16 [E]
$
$ gpg2 --list-secret-keys
/home/ubuntu-xenial/user/.gnupg/pubring.kbx
--------------------------------------------
sec rsa2048/245FD525 2016-12-16 [SC]
uid [ unknown] my_name <my_e-mail>
ssb rsa2048/4D0AABD3 2016-12-16 [E]
$
$ gpg2 --export -a 245FD525 > Launchpad-GPG-Public-Key.asc
$ gpg2 --export -a 245FD525 > Launchpad-GPG-Private-Key.asc
---> Enter secret passphrase
$
在new computer：
$ gpg2 --import Launchpad-GPG-Public-Key.asc
gpg: keybox '/home/ubuntu-xenial/user/.gnupg/pubring.kbx' created
gpg: /home/ubuntu-xenial/user/.gnupg/trustdb.gpg: trustdb created
gpg: key 245FD525: public key "my_name <my_e-mail>" imported
gpg: Total number processed: 1
gpg: imported: 1
$ gpg2 --import Launchpad-GPG-Private-Key.asc.asc
gpg: key 245FD525: "my_name <my_e-mail>" not changed
gpg: key 245FD525: secret key imported
gpg: Total number processed: 3
gpg: unchanged: 1
gpg: secret keys read: 3
gpg: secret keys imported: 2
$
$ gpg2 --edit-key 245FD525
gpg (GnuPG) 2.1.11; Copyright (C) 2016 Free Software Foundation, Inc.
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
Secret key is available.
sec rsa2048/245FD525
created: 2016-12-16 expires: never usage: SC
trust: unknown validity: unknown
ssb rsa2048/4D0AABD3
created: 2016-12-16 expires: never usage: E
[ unknown] (1). my_name <my_e-mail>
gpg> trust
sec rsa2048/245FD525
created: 2016-12-16 expires: never usage: SC
trust: unknown validity: unknown
ssb rsa2048/4D0AABD3
created: 2016-12-16 expires: never usage: E
[ unknown] (1). my_name <my_e-mail>
Please decide how far you trust this user to correctly verify other users' keys
(by looking at passports, checking fingerprints from different sources, etc.)
1 = I don't know or won't say
2 = I do NOT trust
3 = I trust marginally
4 = I trust fully
5 = I trust ultimately
m = back to the main menu
Your decision? 5
Do you really want to set this key to ultimate trust? (y/N) y
sec rsa2048/245FD525
created: 2016-12-16 expires: never usage: SC
trust: ultimate validity: unknown
ssb rsa2048/4D0AABD3
created: 2016-12-16 expires: never usage: E
[ unknown] (1). my_name <my_e-mail>
Please note that the shown key validity is not necessarily correct
unless you restart the program.
gpg> <Ctrl><D>
$
$ gpg --list-keys [user]
gpg: checking the trustdb
gpg: public key of ultimately trusted key 245FD525 not found
gpg: 3 marginal(s) needed, 1 complete(s) needed, PGP trust model
gpg: depth: 0 valid: 1 signed: 0 trust: 0-, 0q, 0n, 0m, 0f, 1u
gpg: error reading key: public key not found
$
在此阶段，该过程仍未完成，我仍然无法使用它来签名将包上传到我的 PPA......
我在这里犯了一个错误，我应该用 gpg 上使用的电子邮件地址替换 [用户] ...
$ gpg --list-keys <e-mail address>
pub rsa2048 2016-12-16 [SC]
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX245FD525
uid [ultimate] e-mail name <e-mail address>
sub rsa2048 2016-12-16 [E]
$
答案1
几年前，当我最初创建 PGP 密钥时，我发现这个答案在 Ask Ubuntu 上：
$ gpg --keyserver keyserver.ubuntu.com --recv-keys 245FD525
gpg: requesting key 245FD525 from hkp server keyserver.ubuntu.com
gpg: key 245FD525: public key "my_name <my_e-mail>" imported
gpg: 3 marginal(s) needed, 1 complete(s) needed, PGP trust model
gpg: depth: 0 valid: 1 signed: 0 trust: 0-, 0q, 0n, 0m, 0f, 1u
gpg: Total number processed: 1
gpg: imported: 1 (RSA: 1)
$ gpg --no-default-keyring -a --export 245FD525 | gpg --no-default-keyring --keyring ~/.gnupg/trustedkeys.gpg --import -
gpg: keyring `/home/ubuntu-xenial/[user]/.gnupg/trustedkeys.gpg' created
gpg: key 245FD525: public key "my_name <my_e-mail>" imported
gpg: Total number processed: 1
gpg: imported: 1 (RSA: 1)
$ gpg --list-keys [user]
pub 2048R/245FD525 2016-12-16
uid my_name <my_e-mail>
sub 2048R/4D0AABD3 2016-12-16
$
现在我可以在另一台计算机上使用我的 Launchpad PGP Key。