Listing PGP Public Keys#

$ gpg -k
/home/testuser/.gnupg/pubring.gpg
------------------------
pub   2048R/95B068C1 2018-10-18
uid                  Test User <testuser@example.com>
sub   2048R/D7F9E627 2018-10-18

Listing PGP Private Keys#

$ gpg -K
/home/testuser/.gnupg/secring.gpg
------------------------
sec   2048R/95B068C1 2018-10-18
uid                  Test User <testuser@example.com>
ssb   2048R/D7F9E627 2018-10-18

Generating PGP Key#

$ gpg --gen-key
gpg (GnuPG) 1.4.23; Copyright (C) 2015 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.

Please select what kind of key you want:
   (1) RSA and RSA (default)
   (2) DSA and Elgamal
   (3) DSA (sign only)
   (4) RSA (sign only)
Your selection?
RSA keys may be between 1024 and 4096 bits long.
What keysize do you want? (2048)
Requested keysize is 2048 bits
Please specify how long the key should be valid.
         0 = key does not expire
      <n>  = key expires in n days
      <n>w = key expires in n weeks
      <n>m = key expires in n months
      <n>y = key expires in n years
Key is valid for? (0)
Key does not expire at all
Is this correct? (y/N) y

You need a user ID to identify your key; the software constructs the user ID
from the Real Name, Comment and Email Address in this form:
    "Heinrich Heine (Der Dichter) <heinrichh@duesseldorf.de>"

Real name: Test User
Email address: testuser@example.com
Comment:
You selected this USER-ID:
    "Test User <testuser@example.com>"

Change (N)ame, (C)omment, (E)mail or (O)kay/(Q)uit? o
You need a Passphrase to protect your secret key.

We need to generate a lot of random bytes. It is a good idea to perform
some other action (type on the keyboard, move the mouse, utilize the
disks) during the prime generation; this gives the random number
generator a better chance to gain enough entropy.
.......+++++
+++++
We need to generate a lot of random bytes. It is a good idea to perform
some other action (type on the keyboard, move the mouse, utilize the
disks) during the prime generation; this gives the random number
generator a better chance to gain enough entropy.
.+++++
.........+++++
gpg: /home/testuser/.gnupg/trustdb.gpg: trustdb created
gpg: key 95B068C1 marked as ultimately trusted
public and secret key created and signed.

gpg: checking the trustdb
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
pub   2048R/95B068C1 2018-10-18
      Key fingerprint = 50DE 6EF9 7C5B 53D5 B1C9  F704 4177 A77D 95B0 68C1
uid                  Test User <testuser@example.com>
sub   2048R/D7F9E627 2018-10-18

Exporting PGP Public Key#

$ gpg --armor --output testuser.gpg --export 'Test User'

Importing PGP Public Key#

$ gpg --import testuser.gpg

Encrypting a File#

$ gpg --encrypt --recipient 'Test User' --output test.txt.gpg test.txt

Decrypting a File#

$ gpg --decrypt --output test.txt test.txt.gpg

References#