Two shell command I often use in data analysis

export PS1=“$”

When I use the rstudio, it often prompts me a very long tip for me. It hinders me to write some comands. Thus, I use `export PS1=“$”` to short the tips. I think the result is pretty good.

tree -L 2

this command help me to show the structure of folder, which is very convienient. The number in the command you can specify it as you want to show the depth of folder.