How to concatinate many PDFs to one file using a command on macOS

When I've tryed to concatinate many PDFs to one file using a command on macOS, I found this blog(in Japanese).

2009-08-15
[mac] コマンドラインからpdfを結合する
http://samurai20000.hatenablog.com/entry/20090815/1250340293

I introduce the way that this blog say:

$ /System/Library/Automator/Combine PDF Pages.action/Contents/Resources/join.py --output output.pdf input1.pdf input2.pdf ...