How can I change server port of Spring Boot?

As a Jvm option:

 --server.port=8090

How can I delete all lines in Vim?

To delete all lines in a file with vim you can type:

 :1,$d  

in command mode. Semicolon(:) indicates a command, 1,$ indicates a range that following command will work. In that case from 1st line to the last line. d means delete the specified lines.

Another command for the same purpose is:

 gg  
 dG  

gg takes you to first line and d means delete again and G means to the last line.

And one more command is:

 :%d  

Introduction

As a computer engineering student it's a shame not to have a personal blog for years. I tried but I couldn't succeed. At this blog I'll try to note new things that I learned. Topic can change but mostly I'll try to write about programming. I like to code in Python and I want to learn Lisp. It is possible that the content can be very basic.

PS: I just decided to turn that blog to a FAQ about everything that I used to ask. Every post will be working solutions for me.