subversion user control

Reference sites , but these sites had some conflicting information
http://chestofbooks.com/computers/revision-control/subversion-svn/Blanket-Access-Control-Serverconfig-Httpd-Authz-Blanket.html

and

http://cheminfo.informatics.indiana.edu/~rguha/misc/svnapache.html

http://davidwinter.me.uk/articles/2006/03/03/access-control-for-subversion-with-apache2-and-authz/
*the above link has some incorrect information in which i will correct later , when creating the access file the tags should be [reposname:/] instead of [/reponame]
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command line
===========
checkout
svn co svn+ssh://123.45.67.890/home/demo/repository/project1/trunk project1
...
svn co svn+ssh://123.45.67.890/home/demo/repository/project2/trunk project2

commit
svn import /home/demo/project2/ file:///home/demo/repository/project2/trunk -m "Initial import of project2"

faq:
http://subversion.tigris.org/faq.html