Books Read in 2020

Posted on: Thu, 01/02/2020 - 05:29 By: yunyao

I challenge myself to read or listen to 52 books in 2020. I'm listing them here with a short descriptions about them to keep track of what I've read and key ideas learned.


Posted on: Sun, 08/26/2018 - 07:30 By: Huahai



Backup Discourse with External PostgreSQL Server

Posted on: Sun, 01/21/2018 - 05:58 By: Huahai

Discourse is a modern forum software that is quite popular in the technology circle. One can install a Discourse server easily with the recommended method of using docker. All the services needed by the Discourse server, e.g. Postgresql and Redis, will be running inside a docker container, which is fine for a small installation. However, if one has already an external Postgresql server running, e.g.

FreeIPA in AWS EC2

Posted on: Thu, 12/07/2017 - 23:34 By: Huahai

Show how to install and configure freeIPA server and clients in AWS EC2 using Route53. Point out several important issues.

Ecobee3 installation with K wire

Posted on: Fri, 12/01/2017 - 06:13 By: Huahai

How to install Ecobee3 smart thermostat when one of the existing wire connection is labeled K on the old device? This is problematic because K wire does not appear in the Ecobee3's documentation, nor in the on screen menu. I found a solution: simply connect the K wire to Y1, then enable the G connection on Ecobee3 configuration screen.​

Tips for Traveling with a Baby in Japan - Diaper Bag for Air Travel

Posted on: Wed, 01/11/2017 - 01:09 By: yunyao

The list of items contained in our diaper bag for air travel, annotated with how essential each item was based on our experience as follows:

*** Must have

**   Nice to have

*     Not needed

For travel gear that may not fit in your diaper bag, please visit this page.

  • Portable changing pad (***)

This is definitely essential for both in the airports as well as on the airplane. We like our JJ Cole Collections Changing Clutch.

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