After installing CollabNet Subversion Edge, you will need to go to the management page via http://localhost:3343/csvn/ in order to manage as well as create the first repository. However, when start Subversion, it says “The server could not bind to port “80”. Check permission to use the port and that another process is not using the port.”. This occurs because IIS or Apache might be installed on your computer.
Therefore, we need to change Default port (80) for CollabNet Subversion Edge.
At the management page, go to Administration tab then change 80 in the Port: textbox to another number (ex: 8081) then click Save button.
Go back to Status tab and click Start button to start Subversion.
… then it works
Try it by opening http://localhost:8081/viewvc/ or http://localhost:8081/svn/
Note: you also can see the change in /data/conf/csvn_main_httpd.conf file:
ServerAdmin "firstname.lastname@example.org" ServerName "HoanHuynh-PC:8081" Listen 8081