SVN permissions and passwords

Questions about setting permissions and using passwords in Subversion.

• How do I configure read write access for users to have rw access to three repositories and no access to the parent or other repositories?
  Setup the three repositories, then modify the svn_access_file to allow specific users rw access to the repository and no access to the parent and the other repositories.
• What Subversion operations require read access versus write access?
  Different Subversion operations require different access as listed.
• I changed my SVN password, why can't I access my repository?
  After you change your password you may have trouble accessing your repository without the --password parameter.
• Why does my Subversion client cache passwords in plain text on disk?
  On UNIX/Linux, there are no standard system encryption facilities, so the password is stored as text in ~/.subversion/auth/.
• Why do read-only operations still need repository write access?
  Certain operations require writing temporary data and so need write access. This only applies to the Berkeley DB backend; the FSFS backend does not exhibit this behavior.
• What options are there for authenticating Subversion against an Active Directory Domain?
  Thanks to the Apache project and other Open Source projects, there are multiple options, including LDAP, SSPI, and Kerberos.