What is the difference between remote commands?

Question

git

Set remote turnip:

git remote add pseudo [email protected]:user/project.git

Pull:
git pull
Always an error

fatal: No remote repository specified. Please, specify either a URL or a
remote name from which new revisions should be fetched.

Another team

git config remote.origin.url [email protected]:user/project.git

After that, pull always works fine. It is not clear why this is so, why, after remote addgit, this repository cannot be added to the config as a remote one? Why did they come up with these 2 teams and why can't one be dispensed with in this case?

Answer 1

In the first you add pseudo, in the second you change origin, that is, overwrite it.
Before git pulldo not forget to make sure git fetch --allthat git at least knows what you are going to pull.