Forgot PIN for Linux Remote Desktop, but still have SSH access? Here's a solution. Remember to backup all config files!

set-chrome-remote-desktop-pin.py

#!/usr/bin/env python

# Portions Copyright Chromium Project.

import base64
import hashlib
import hmac
import json
import os
import sys

if len(sys.argv) != 2:
    print 'Usage: {} <pin>'.format(sys.argv[0])
    sys.exit(1)

config_dir = os.path.expanduser('~/.config/chrome-remote-desktop')

for config_file in os.listdir(config_dir):
    if config_file.endswith('.json'):
        config_file = os.path.join(config_dir, config_file)
        config = json.load(open(config_file))
        config['host_secret_hash'] = 'hmac:' + base64.b64encode(
                hmac.new(str(config['host_id']), sys.argv[1],
                    hashlib.sha256).digest())
        json.dump(config, open(config_file, 'w'))
        print 'Written', config_file