Lot of times, you have to ssh to a server with bastion host. If you dont know what is bastion host then see this:
Now, in such cases, either you add an entry in “~/.ssh/config” to route the ssh through the bastion host or do ssh to bastion host and then ssh from there to the actual host. But wait, there is always a better way:
ssh -t <bastion host> ssh -t <actual host>
You can use the usernames as required for the 2 hosts and then you will have to enter passwords, first for the bastion host and then the actual host.
BTW, you can use tunneling options as well with the above command.