Problem in ssh port forwarding on Mac

I've just started playing with ssh on Mac. I want to setup ssh port forwarding. I tried the following command:

ssh -L 10090:192.168.1.105:3892 -l svnac@192.168.1.83

On executing this command, the usage of ssh command is displayed on the terminal. D开发者_运维技巧oes this mean I have done something wrong? What am I missing over here?

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It looks like you're using a -l where you don't need it. Try this:

ssh -L 10090:192.168.1.105:3892 svnac@192.168.1.83