How to make 301 redirect in Netlify work?

1. I can't get the 301 redirect to work in Netlify at all (I've seen other answers, but it doesn't work).

2. I've made the _redirects file and placed it in the root of my github ripo.

   https://some-domain.netlify.com/* https://www.mydomain.tk/:splat 301!

I expect it that when someone types this: https://some-domain.netlify.com/ he will be redirected to here: https://www.mydomain.tk , but that doesn't happen.

2. I'm trying to redirect https://some-domain.netlify.com/ to https://www.mydomain.tk/portofolio/
   this didn't work either

Thanks for the help

The issue is that the _redirects file does not go to the root of your repository unless the root of your repository is your deploy path.

The _redirects file must be placed into the root of your deploy path.

example

In the case below, the deploy directory after the build command is public in the repository.

root
  ├ public
  | ├ _redirects
  | └ index.html
  ├ src
  └ lib

Note: Remember that you can also put redirects in your netlify.toml file. The netlify.toml file does go in the root of the repository.

netlify.toml

[build]
  command = "npm run build"
  publish = "public"

[[redirects]]
  from = "https://some-domain.netlify.com/*"
  to = "https://www.mydomain.tk/:splat"
  status = 301
  force = true

There is a playground to build them from the _redirects format to netlify.toml format