You need to SSH into your server and put your portlet in the Liferay deployment directory. The deployment directory is set in the following file:
Please, change installdir with the directory where you have installed Liferay.
Here, you will find a line like this one:
This would be the directory where you have to copy the files to deploy.
I hope this helps you. If not, please, come back and post here the errors shown in the