My ISP has provided me with an adsl router which is connected to the telephone jack.

My machine is connected through one of the available Ethernet ports on the adsl router.

Is there any way that I can get the public IP as the ip of my linux box??

So that I will be able to connect to my linux machine from the internet through SSH??

Please I am in a hurry to findout a way. I am using a Linksys ADSL router.

You can use one of the dynamic DNS services. I like www.dyndns.com. They have a level of service that is free as well as more advanced levels of service that are available for a fee. They also have a dynamic DNS client software for Linux that will keep your dynamic DNS record up to date when your ISP changes your public IP address. You can then connect to your home LAN by using your dynamic DNS name. It is possible that your router already has a dynamic DNS client software built into it so you would not have to run the client software on your Linux machine.

if you go to the webpage on the adsl router, you should be able to set up port forwarding and forward tcp ssh to your linux box.