encrypt file

gpg -c <filename>

decrypt file

gpg <filename>.gpg

clearsign message

gpg --default-key <key_id> -o <output_file> --clearsign <input_file>

search keys

gpg --search <string>

adding notations

i have used this for setting keyoxide proofs 

 ──── ─ gpg --edit-key pyratebeard
Secret key is available.

sec  rsa4096/0xC7877C715113A16D
     created: 2016-08-18  expires: never       usage: SC  
     trust: ultimate      validity: ultimate
ssb  rsa2048/0xA8CA96DB91B17F70
     created: 2016-08-18  expires: 2024-08-16  usage: E   
ssb  rsa2048/0x20E945DD7FC543B7
     created: 2016-08-18  expires: 2024-08-16  usage: SA  
[ultimate] (1). pyratebeard <root@pyratebeard.net>
[ultimate] (2)  pyratebeard <pyratebeard@protonmail.com>

gpg> uid 1

sec  rsa4096/0xC7877C715113A16D
     created: 2016-08-18  expires: never       usage: SC  
     trust: ultimate      validity: ultimate
ssb  rsa2048/0xA8CA96DB91B17F70
     created: 2016-08-18  expires: 2024-08-16  usage: E   
ssb  rsa2048/0x20E945DD7FC543B7
     created: 2016-08-18  expires: 2024-08-16  usage: SA  
[ultimate] (1)* pyratebeard <root@pyratebeard.net>
[ultimate] (2)  pyratebeard <pyratebeard@protonmail.com>

gpg> notation 
Enter the notation: proof@ariadne.id=irc://irc.darkscience.net/pyratebeard
Current notations for user ID "pyratebeard <root@pyratebeard.net>":
         proof@ariadne.id=https://harbour.cafe/@pyratebeard
         proof@ariadne.id=dns:pyratebeard.net?type=TXT
         proof@ariadne.id=irc://irc.libera.chat/pyratebeard
Adding notation: proof@ariadne.id=irc://irc.darkscience.net/pyratebeard

sec  rsa4096/0xC7877C715113A16D
     created: 2016-08-18  expires: never       usage: SC  
     trust: ultimate      validity: ultimate
ssb  rsa2048/0xA8CA96DB91B17F70
     created: 2016-08-18  expires: 2024-08-16  usage: E   
ssb  rsa2048/0x20E945DD7FC543B7
     created: 2016-08-18  expires: 2024-08-16  usage: SA  
[ultimate] (1)* pyratebeard <root@pyratebeard.net>
[ultimate] (2)  pyratebeard <pyratebeard@protonmail.com>

gpg> save

to upload the new key to a keyserver incant 

gpg --export root@pyratebeard.net | curl -T - https://keys.openpgp.org

view the notations 

gpg --edit-key pyratebeard
Secret key is available.

sec  rsa4096/0xC7877C715113A16D
     created: 2016-08-18  expires: never       usage: SC  
     trust: ultimate      validity: ultimate
ssb  rsa2048/0xA8CA96DB91B17F70
     created: 2016-08-18  expires: 2024-08-16  usage: E   
ssb  rsa2048/0x20E945DD7FC543B7
     created: 2016-08-18  expires: 2024-08-16  usage: SA  
[ultimate] (1). pyratebeard <root@pyratebeard.net>
[ultimate] (2)  pyratebeard <pyratebeard@protonmail.com>

gpg> uid 1

sec  rsa4096/0xC7877C715113A16D
     created: 2016-08-18  expires: never       usage: SC  
     trust: ultimate      validity: ultimate
ssb  rsa2048/0xA8CA96DB91B17F70
     created: 2016-08-18  expires: 2024-08-16  usage: E   
ssb  rsa2048/0x20E945DD7FC543B7
     created: 2016-08-18  expires: 2024-08-16  usage: SA  
[ultimate] (1)* pyratebeard <root@pyratebeard.net>
[ultimate] (2)  pyratebeard <pyratebeard@protonmail.com>

gpg> showpref 
[ultimate] (1)* pyratebeard <root@pyratebeard.net>
     Cipher: AES256, AES, 3DES
     AEAD: 
     Digest: SHA512, SHA256, SHA1
     Compression: ZLIB, ZIP, Uncompressed
     Features: MDC, AEAD, Keyserver no-modify
     Notations: proof@ariadne.id=irc://irc.libera.chat/pyratebeard
                proof@ariadne.id=dns:pyratebeard.net?type=TXT
                proof@ariadne.id=https://harbour.cafe/@pyratebeard
                proof@ariadne.id=irc://irc.darkscience.net/pyratebeard

gpg> quit
  • getting "There is no assurance this key belongs to the named user" error
  • could be from copying keys to a new machine 
    gpg --edit-key <key_id>
gpg> trust
# select trust level

useful links

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