svn

revert working copy to previous version

• method1

  svn update -r ARG
  

• method2

  svn merge -r ARG1:ARG2 .
  

• method3

  svn diff -r ARG1:ARG2 > ../diff.patch
  patch -p0 < ../diff.patch
  

查看某个文件中代码的修改历史：

svn blame -v file_name