Download avatar (XEP-0084) for a certain contact. If nothing happens after using this command the user either doesn't have an avatar set at all or doesn't use XEP-0084 to publish it.
/avatar get <barejid>
/avatar open <barejid>
Download the avatar. barejid is the JID to download avatar from.
Download avatar and open it with command.
/avatar get firstname.lastname@example.org
/avatar open email@example.com