* To add someone to your keychain (need to use keys.gnupg.net ip instead)
```
gpg2 --keyserver `dig +short keys.gnupg.net | egrep "^[0-9]" | head -1` --search-key <personA@email.com | fingerprint>
```

* To trust someone you added to your keychain
Non-interactive
```
gpg2 --fingerprint --with-colons <personA@email.com | fingerprint> | sed -E -n -e 's/^fpr:::::::::([0-9A-F]+):$/\1:6:/p' | gpg2 --import-ownertrust
```

Interactive
```
> gpg2 --edit-key <personA@email.com | fingerprint>
....
gpg2> trust
....
gpg2> 6
```