From Ubuntu 18, the network IFUPDOWN has been replaced by NETPLAN. Netplan doesn’t provide up/down hook scripts. But we can do it using networkd-dispatcher.

JavaScript array methods to help you make your code easier.
[filter, find, map, reduce, every, more]

Open up “Control Panel | System and Security | System”
In the dialog click on “Advanced system settings” (requires Admin rights)
The “System Properties” dialog will be displayed
Make sure you are in the “Advanced” register
In the “User Profiles” section click on “Settings”
The “User Profiles” dialog is displayed
Select the account. Hit Delete.

The cause of the problem is that the built-in network config of Ubuntu 18.04 no longer uses the NIC Mac address as the default id for DHCP requests.

• Protect the /etc/resolv.conf file

  chattr +i /etc/resolv.conf
  

Problem: A user complained that his account was lockouted frequencely. He changed password several days ago.

By default, the Windows server 2016 enables MapsBroker, OneSyncSvc and WbioSrvc services. Those services may be stopped for some reason and they causes error messages on dashboard. It’s kind of noisy. Use the following command to disable them in Command Prompt (Admin).

Allow port 6000 incoming traffic on Windows firewall. If there are multiple displays, the server listens on port 6001, 6002, etc.

Requirement:

// Should not match
''
' '
'  '
'   '
// Should match
'one-word'
'one-word '
' one-word'
' one-word '
'one phrase with whitespace'
'one phrase with whitespace '
' one phrase with whitespace'
' one phrase with whitespace '