Upgrading to 2.0 Error - Can't connect to the bootstrap socket (localhost 8000) ECONNREFUSED

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I got nothing when doing the ghost restart,

then got this message after I try use
nohup ghost run &

[2018-08-27 14:35:40] ERROR

NAME: InternalServerError
MESSAGE: (EADDRINUSE) Cannot start Ghost.

level: normal

Port 2368 is already in use by another program.
Is another Ghost instance already running?
InternalServerError: (EADDRINUSE) Cannot start Ghost.
    at new GhostError (/var/www/ghost/versions/2.0.3/core/server/lib/common/errors.js:9:26)
    at Server.<anonymous> (/var/www/ghost/versions/2.0.3/core/server/ghost-server.js:79:30)
    at emitOne (events.js:116:13)
    at Server.emit (events.js:211:7)
    at emitErrorNT (net.js:1375:8)
    at _combinedTickCallback (internal/process/next_tick.js:138:11)
    at process._tickCallback (internal/process/next_tick.js:180:9)

[2018-08-27 14:35:40] WARN Can't connect to the bootstrap socket (localhost 8000) ECONNREFUSED
[2018-08-27 14:35:40] WARN Tries: 0
[2018-08-27 14:35:40] WARN Retrying...
[2018-08-27 14:35:40] WARN Can't connect to the bootstrap socket (localhost 8000) ECONNREFUSED
[2018-08-27 14:35:40] WARN Tries: 1
[2018-08-27 14:35:40] WARN Retrying...
[2018-08-27 14:35:40] ERROR "GET /" 503 46ms

NAME: MaintenanceError
MESSAGE: Site is starting up, please wait a moment then retry.

level: normal

MaintenanceError: Site is starting up, please wait a moment then retry.
    at new MaintenanceError (/var/www/ghost/versions/2.0.3/node_modules/ghost-ignition/lib/errors/index.js:136:23)
    at maintenance (/var/www/ghost/versions/2.0.3/core/server/web/middleware/maintenance.js:13:21)
    at Layer.handle [as handle_request] (/var/www/ghost/versions/2.0.3/node_modules/express/lib/router/layer.js:95:5)
    at trim_prefix (/var/www/ghost/versions/2.0.3/node_modules/express/lib/router/index.js:317:13)
    at /var/www/ghost/versions/2.0.3/node_modules/express/lib/router/index.js:284:7
    at Function.process_params (/var/www/ghost/versions/2.0.3/node_modules/express/lib/router/index.js:335:12)
    at next (/var/www/ghost/versions/2.0.3/node_modules/express/lib/router/index.js:275:10)
    at filterPrivateRoutes (/var/www/ghost/versions/2.0.3/core/server/apps/private-blogging/lib/middleware.js:44:20)
    at Layer.handle [as handle_request] (/var/www/ghost/versions/2.0.3/node_modules/express/lib/router/layer.js:95:5)
    at trim_prefix (/var/www/ghost/versions/2.0.3/node_modules/express/lib/router/index.js:317:13)
    at /var/www/ghost/versions/2.0.3/node_modules/express/lib/router/index.js:284:7
    at Function.process_params (/var/www/ghost/versions/2.0.3/node_modules/express/lib/router/index.js:335:12)
    at next (/var/www/ghost/versions/2.0.3/node_modules/express/lib/router/index.js:275:10)
    at checkIsPrivate (/var/www/ghost/versions/2.0.3/core/server/apps/private-blogging/lib/middleware.js:31:20)
    at Layer.handle [as handle_request] (/var/www/ghost/versions/2.0.3/node_modules/express/lib/router/layer.js:95:5)
    at trim_prefix (/var/www/ghost/versions/2.0.3/node_modules/express/lib/router/index.js:317:13)

[2018-08-27 14:35:40] INFO "GET /assets/built/screen.css?v=a70d710117" 200 6ms
[2018-08-27 14:35:40] WARN Can't connect to the bootstrap socket (localhost 8000) ECONNREFUSED
[2018-08-27 14:35:40] WARN Tries: 2
[2018-08-27 14:35:40] WARN Retrying...
[2018-08-27 14:35:40] ERROR "GET /" 503 4ms

NAME: MaintenanceError
MESSAGE: Site is starting up, please wait a moment then retry.

level: normal

MaintenanceError: Site is starting up, please wait a moment then retry.
    at new MaintenanceError (/var/www/ghost/versions/2.0.3/node_modules/ghost-ignition/lib/errors/index.js:136:23)
    at maintenance (/var/www/ghost/versions/2.0.3/core/server/web/middleware/maintenance.js:13:21)
    at Layer.handle [as handle_request] (/var/www/ghost/versions/2.0.3/node_modules/express/lib/router/layer.js:95:5)
    at trim_prefix (/var/www/ghost/versions/2.0.3/node_modules/express/lib/router/index.js:317:13)
    at /var/www/ghost/versions/2.0.3/node_modules/express/lib/router/index.js:284:7
    at Function.process_params (/var/www/ghost/versions/2.0.3/node_modules/express/lib/router/index.js:335:12)
    at next (/var/www/ghost/versions/2.0.3/node_modules/express/lib/router/index.js:275:10)
    at filterPrivateRoutes (/var/www/ghost/versions/2.0.3/core/server/apps/private-blogging/lib/middleware.js:44:20)
    at Layer.handle [as handle_request] (/var/www/ghost/versions/2.0.3/node_modules/express/lib/router/layer.js:95:5)
    at trim_prefix (/var/www/ghost/versions/2.0.3/node_modules/express/lib/router/index.js:317:13)
    at /var/www/ghost/versions/2.0.3/node_modules/express/lib/router/index.js:284:7
    at Function.process_params (/var/www/ghost/versions/2.0.3/node_modules/express/lib/router/index.js:335:12)
    at next (/var/www/ghost/versions/2.0.3/node_modules/express/lib/router/index.js:275:10)
    at checkIsPrivate (/var/www/ghost/versions/2.0.3/core/server/apps/private-blogging/lib/middleware.js:31:20)
    at Layer.handle [as handle_request] (/var/www/ghost/versions/2.0.3/node_modules/express/lib/router/layer.js:95:5)
    at trim_prefix (/var/www/ghost/versions/2.0.3/node_modules/express/lib/router/index.js:317:13)

[2018-08-27 14:35:40] WARN Can't connect to the bootstrap socket (localhost 8000) ECONNREFUSED
[2018-08-27 14:35:40] INFO Ghost boot 5.129s