I wrote the way to check host machine IP address from VirtualBox guest machine connected as NAT. Substantially speaking, it is the gateway address of the guest machine.
When I launched Kotlin API server in Host, Windows, and Launched Rails Web application in Guest Linux, I needed to know the host machine IP address for accessing to the API.
Here’s the way I added swap file in AWS EC2, t2.medium. At that time, I was using Jenkins in the computer, and Jenkins didn’t work because of less swap area.
Continue reading AWS EC2: How I Added Swap FileHere is the way to get current year, month, day, hour, minute and second in PostgreSQL.
Continue reading PostgreSQL: How to Get Current Year, Month, Day, Hour, Minute and SecondKotlin String has methods, isBlank() and isEmpty(). I wrote about their difference.
