git的分支或主版本库的恢复

实操

# alias gitlog='git log --graph --pretty=oneline --abbrev-commit'
# gitlog |head -1     查看commit id 和操作历史
* e793b1d 删除 44.txt
# ls
55.txt  66.txt  77.txt  88.txt  aa.txt  bb.txt  cc.txt  dd.txt  ee.txt  README.md  readme.txt
# rm 55.txt  -f
# git add --all
# git commit -m "rm 55.txt"
[master 4093ac5 rm 55.txt
1 file changed, 1 deletion(-)
delete mode 100644 55.txt
# gitlog |head -2
* 4093ac5 rm 55.txt
* e793b1d 删除 44.txt
# ls
66.txt  77.txt  88.txt  aa.txt  bb.txt  cc.txt  dd.txt  ee.txt  README.md  readme.txt
# git reset --hard  e793b1d        恢复到上一个版本 也可以用git reset --hard HEAD^
HEAD is now at e793b1d 删除 44.txt
# ls
55.txt  66.txt  77.txt  88.txt  aa.txt  bb.txt  cc.txt  dd.txt  ee.txt  README.md  readme.txt