$ gpg --gen-key
$ gpg --list-keys
With a passprhare
$ gpg -ca -o output.txt.gpg input.txt
with a certificate and from STDOUT
$ gpg -ea
or if you know the name already (can be key, name or email)
$ gpg -ea -r "Ahmy"
$ gpg -d file.txt.gpg
Public key
$ gpg --export -a "name" > public.key
-a is to create armored ascii output.
Private Key
$ gpg --export-secret-key -a "name" > private.key
Public key
$ gpg --export-secret-key -a "rtCamp" > private.key
Private Key
$ gpg --allow-secret-key-import --import private.key
Public Key
$ gpg --delete-key "Real Name"
Private Key
$ gpg --delete-secret-key "Real Name"