yum install subversion
yum install mod_dav_svn
mkdir /var/www/svn
chown -R apache.apache svn
cd /var/www/svn
svnadmin create papers
chown -R apache.apache papers
htpasswd -c passwd someone
modify /etc/httpd/conf.d/subversion.conf as follows:
DAV svn
SVNParentPath /var/www/svn
AuthType Basic
AuthName "Authorization Realm"
AuthUserFile /var/www/svn/passwd
Require valid-user
apachectl restart