github 创立新 branch 办法
code->main, 输出新 branch 名，create branch:
[postgres@hgcndn git_test]$ git pull
* [new branch] dev -> origin/dev
Already up-to-date.
[postgres@hgcndn git_test]$ git branch -a
* main
remotes/origin/HEAD -> origin/main
remotes/origin/dev
remotes/origin/main删除所有文件
[postgres@hgcndn git_test]$ git rm * -r
rm 'README.md'
[postgres@hgcndn git_test]$ git add .
[postgres@hgcndn git_test]$ git commit -m "clean all files"
[dev 3f73979] clean all files
1 file changed, 6 deletions(-)
delete mode 100644 README.md
[postgres@hgcndn git_test]$ git push origin dev
Counting objects: 3, done.
Compressing objects: 100% (1/1), done.
Writing objects: 100% (2/2), 236 bytes | 0 bytes/s, done.
Total 2 (delta 0), reused 0 (delta 0)
To git@github.com:xiangbin1997/git_test.git
5c9dcce..3f73979 dev -> dev