The solutions for exercise 05&06 of MIT.Missing-semester(2020)


From what we have seen, we can use some ps aux | grep commands to get our jobs’ pids and then kill them, but there are better ways to do it. Start a sleep 10000 job in a terminal, background it with Ctrl-Z and continue its execution with bg. Now use pgrep to find its pid and pkill to kill it without ever typing the pid itself. (Hint: use the -af flags).

The solutions for exercise 03&04 of MIT.Missing-semester(2020)

Complete vimtutor. Note: it looks best in a 80x24 (80 columns by 24 lines) terminal window.

It is a tutorial for beginners of vim. I will just put some notes which are not mentioned in course here.

  • U command: When we press u in normal mode, we can undo the last command. What U does is fixing a whole line.

  • Ctrl + G: show your location in the file and the file status. Type the linenumber you want to go, then press G, then you are there.

How to draw a simple relation graph in Python


The process of drawing a simple relation graph in python can be broken down into 2 steps.

  1. Define a graph.
  2. Draw a graph.

In this step, we will use the networkx package.

If you are using conda, you can just type conda install networkx

If you are using pip, you can just type pip install networkx

First of all, you need to create a graph.