Category: Troubleshooting

Using telnet as a tool for troubleshooting network port connections

Note that you may need to enable telnet on your workstation (see this Article: How to enable telnet for troubleshooting when CMD reports: “‘telnet’ is not recognized as an internal or external command”)

Once you have telnet enabled, follow these steps:

  1. Open a command prompt
  2. Type in “telnet <IP ADDRESS OF SERVER PC> <PORT>” and press enter.
  3. For example, you would type “telnet 123.45.67.89 1521”
  4. If a blank screen appears then the port is open, and the test is successful.
  5. If you receive a connecting… message or an error message then something is blocking that port.  It could be the Windows firewall, a third party firewall like your anti-virus software, or an institutional hardware firewall between the workstation and the server.

Source: Using telnet as a tool for troubleshooting connection problems on hosted Voyager servers – Ex Libris Knowledge Center

Find out which process is locking a file or folder in Windows

You can use the Resource Monitor for this which comes built-in with Windows 7, 8, 10 and 11! Open Resource Monitor, which can be found By searching for Resource Monitor or resmon.exe in the start menu, or As a button on the Performance tab in your Task Manager Go to the CPU tab Use the search field in the Associated Handles section See blue arrow in screen shot below When you’ve found the handle, you can identify the process by looking at the Image and/or PID column. You can then try to close the application as you normally would, or, if that’s not possible, just right-click the handle and kill the process directly from there. Easy peasy!

Resource Monitor screenshot

Source: filesystems – Find out which process is locking a file or folder in Windows – Super User

Angular component navigation doesn’t work anymore in Webstorm IDE

Please try invalidating caches (File | Invalidate caches, Invalidate and restart) – does the problem persist? Do you have @angular node_modules installed and included in project?

Also try reinstall npm packages:
npm install

Source: Angular component navigation doesn’t work anymore (webstorm) – IDEs Support (IntelliJ Platform) | JetBrains

Typescript debug util – Output json structure to console as formatted and sorted properties

Made a Debug util TypeScript class for formatted output to browser console of json objects, also sorted on property keys alphabetically (usage: simplifies text compare between different json structures).

export class DebugUtils {
  ///Outputs object as formatted json string to console.
  public static ToConsoleJson(value: any, message = null) {
    if (message) {
      console.log(message);
    }
    console.debug(JSON.stringify(value, null, 2));
  }

  ///Outputs object as formatted json string to console sorted alphabetically by property keys.
  public static ToConsoleJsonSortedByKey(obj: any, message = null) {
    //sort object keys alphabetically
    var allKeys = [];
    JSON.stringify( obj, function( key, value ){ allKeys.push( key ); return value; } )
    allKeys.sort();
    const sortedJsonString = JSON.stringify( obj, allKeys, 2);
    if (message) {
      console.log(message);
    }
    console.debug(sortedJsonString);
  }
}