PlantUML is a convinient tool to make diagrams using UML language/format, such as sequence diagrams, use cases, flow diagrams etc.

puml pic-ref

Selected tools:

Live preview in Visual S......

Scala the Language

Install Sbt

echo "deb /" | sudo tee -a /etc/apt/sources.list.d/sbt.list

sudo apt-key adv --keyserver hkp:// --recv 2EE0EA64E40A89B84B2DF73499E82A75642AC823

sudo apt-get update

sudo apt-get install sbt

ref: (v1.0)



Install Single-Node for Test


# server

curl -LO && sudo install minikube-linux-amd64 /usr/local/bin/minikube

minikube start

# client, via snap (snap will NOT work in Docker-like containers)

sudo snap install k......

GRUB Rescue

When being forced into GRUB rescue mode, run ls and ls <one_partition> to check available partitions and find the one that we should boot from [ref].

Then set prefix & root[ref]:

set root=(hdX,Y)

set prefix=(hdX,Y)/boot/grub

insmod n......

NLP Framework Comparison


SpaCy for take-and-use in production. NLTK to try new things.

ref en

en backup

in cn

cn backup

Markdown MD In Case Of

Open Links in New Tabs

using md

For Kramdown, e.g. Jekyll:


In general, the format in Kramdown is {: attribute1="value1" attribute2="value2"}

For pandoc:


In general, the format in Kramd......