Ben Chuanlong Du's Blog

And let it direct your passion with reason.

Using Bash in Docker

If the docker container was started using /bin/bash (you can check using docker ps) command you can access it using attach.

docker attach container_name_or_id

If the docker container was started but not with /bin/bash, you have to create a bash instance inside the container using exec.

docker exec …

Start RStudio Server After Upgrading

It is quite often that the RStudio server cannot be start after upgrading. This is due to running R session in the background. A simple solution is to just restart the host machine. However, it is very risky to start servers (especially remote shared ones). An alternative way is to …

Cygwin Portable

** Things on this page are fragmentary and immature notes/thoughts of the author. Please read with your own judgement! **

Cygwin Portable

  1. The portable versions has some problems

    • Vim, edit mode, backspace doesn't work sometimes (identation related)
  2. Cygwin portable scroll doesn't work after Vim is opened and then closed. but if …

An IO Bug in R

I encountered an input/output bug in R in Linux system. The symptom is that input and output are not displayed in the terminal and the warning message "An unusual circumstance has arisen in the nesting of readline input. Please report using bug.report()" is shown. I found that though …

A Bug in Mathematica

Mathematica is a very intelligent and powerful math software. I use it in my study and research a lot. Mathematica's ability to take derivative and to calculate limit is obvious powerful–way much beyond many mathematician's ability. Mathematica's ability to calculate integral is also powerful. There are many integrals than …

Some Terminologies in Business Investment

Stock Ticker

A stock ticker is a report of the price for certain securities, updated continuously throughout the trading session by the various stock exchanges. A "tick" is any change in price, whether that movement is up or down. A stock ticker automatically displays these ticks, along with other relevant …