How to save password when using Subversion from the console

In ~/.subversion/config, you probably have store-passwords = no. Change it to yes (or just comment it out because it defaults to yes), and the next time you give Subversion your password it should save it.

You might want to ensure that the owner and permissions of ~/.subversion/config are correct (no public or group access; 600).

It depends on the protocol you're using. If you're using SVN + SSH, the SVN client can't save your password because it never touches it - the SSH client prompts you for it directly. In this case, you can use an SSH key and ssh-agent to avoid the constant prompts. If you're using the svnserve protocol or HTTP(S), then the SSH client is handling your password and can save it.