Migrate to Hugo

The dependency of Node.js packages is over complicated and I have wasted lost of time on it. So I migrated the blog from Hexo to Hugo. Further more, the comment system moved to a self-hosted Isso-based server. A workthrough will be online later.

Install hdf5r package in R 4.0.2


While installing the R package “hdf5r” version 1.3.3, I encountered the error:

fatal error: hdf5.h: No such file or directory
 #include <hdf5.h>
compilation terminated.

My OS is Debian buster/10.6, and the package “libhdf5-dev” has been installed. It looks R cannot find the path of hdf5 header and library files.

Enable certbot automatic renewal for cloudflare CDN


A couple of days ago, I received an email from the Let’s Encrypt and was told the certificate of my domain will expire soon. This domain has been encrypted by certbot and the automatic renewal worked well at that time. About one month ago, I added it to cloudflare CDN. It may hindered the certificate renew.

So I spent some time to fix the problem.