Add the following to your configuration

1. Set up a location to scp your configurations to
2. set up the time zone and ntp service – see my note Juniper – How to configure NTP
3. Next – setup your host name:|
   set system host-name SetAUniqueNameForThisDevice
4. set up the archiving

   set system archival configuration transfer-on-commit
   
   set system archival configuration archive-sites "scp://Username@DestinationSystem:/Director/To/Put/Configs" password "MySecretPassword"

   after the above command you will be prompted

   The authenticity of host 'DestinationSystem (DestinationSystemIP)' can't be established.
   ECDSA key fingerprint is **:**:**:**:**:**:**:**:**:**:**.
   Are you sure you want to continue connecting (yes/no)?

   type in yes, then you will get the message

   Warning: Permanently added 'DestinationSystem' (ECDSA) to the list of known hosts.

5. Finish by issuing the command

   commit

If you are running scp/ssh on a port other than 22, change the URL as follows:

scp://user@host:port/path/to/store/config/

Where port is the non-standard ssh port you are going to use
/path/to/store/config/ must be created on the target site before using this configuration