create a new repository on the command line

echo "# planet__WCM-NMIR--support" >> README.md
git init
git add README.md
git commit -m "first commit"
git branch -M 'main'
git remote add origin <https://github.com/CUCDATA/planet__WCM-NMIR--support.git>
# git remote add origin [email protected]:CUCDATA/planet__WCM-NMIR--support.git
git push -u origin 'main'

push an existing repository from the command line

git remote add origin <https://github.com/CUCDATA/planet__WCM-NMIR--support.git>
# git remote add origin [email protected]:CUCDATA/planet__WCM-NMIR--support.git
git branch -M 'main'
git push -u origin 'main'

macOS 给 Git(Github) 设置代理（HTTP/SSH）

Managing remote repositories - GitHub Docs