git的分支或主版本库的恢复

# 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.m��ɢ,��Ļd  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