linux 上的 cd（更改目录）命令

Question

I am trying to code on Colab and if I take a look at the code its self similar with linux, therefore I am asking how the commands work on linux. I am still confused the why cd on linux works. If I have code like this

cd A/B

it means to create new directory right?

after the first code then I write this

!wget https://abcd.com

does it mean I download file from https://abcd.com and store it at B path?

Answer 1

cd does not create anything, it just changes your shell's current working directory.

The ! in your next command is a bit weird, too. It indicates a history expansion of the most recent command line in your shell history starting with wget , adding https://abcd.com to that command line and then running it. That could be pretty much anything, depending on what your shell history contains.