Usage: zerotier-cli [-switches] <command/path> [<args>]

Available switches:
  -h                      - Display this help
  -v                      - Show version
  -j                      - Display full raw JSON output
  -D<path>                - ZeroTier home path for parameter auto-detect
  -p<port>                - HTTP port (default: auto)
  -T<token>               - Authentication token (default: auto)

Available commands:
  info                    - Display status info
  listpeers               - List all peers
  listnetworks            - List all networks
  join <network>          - Join a network
  leave <network>         - Leave a network
  set <network> <setting> - Set a network setting
  listmoons               - List moons (federated root sets)
  orbit <world ID> <seed> - Join a moon via any member root
  deorbit <world ID>      - Leave a moon

Picking the correct package:

Note: Due to the lack of documentation on architecture designations selecting the correct package is an inexact science, as far as I can discerne there are the following categories:

x86

ZeroTier_1.2.4-qnap-x86.qpkg

TS-x51 Series, TS-x51+ Series, TS-x51A Series, TS-x53B Series, TS-x53A Series, TS-x53U Series TS-239 Pro, TS-239 Pro II, TS-239 Pro II+, TS-251, TS-253A, TS-259 Pro, TS-259 Pro+, TS-269L, TS-439 Pro II, TS-451, TS-459 Pro, TS-439 Pro, TS-459U-RP+/SP+, TS-439 Pro II+, TS-459 Pro II, TS-459 Pro+, TS-459U-RP/SP, SS-439-Pro TS-469L, TS-651, TS-851

x86_64

ZeroTier_1.2.4-qnap-x86_64.qpkg

arm-x09

?

arm-x19

ZeroTier_1.2.4-qnap-arm-x19.qpkg

TS-119P II, TS-119P+, TS-119, TS-219P, TS-219, TS-219P II, TS-219P+, TS-221, TS-419U II, TS-419P, TS-419U II, TS-439U-RP/SP TS-419P II, TS-419P+, TS-419U+, TS-419U, SS-439-Pro

arm-x31

ZeroTier_1.2.4-qnap-arm-x31.qpkg

TS-131, TS-231 ,TS-231+, TS-431, TS-431+

arm-x41

zerotier_1.2.4-qnap-arm-x41.qpkg

TS-128, TS-131P, TS-231P, TS-231P2