I'm setting up a VM based Linux Mint 14 Cinnamon dev env and just installed putty to connect to my Ubuntu servers. Problem is that when I try to use "username@hostname" or "username@ip" (no quotes obviously) then I get the error "Unable to open connection to username@hostname: Name or service not known".
If I use just the hostname or IP it connects fine - it asks for the username and then correctly logs in using my private key.
On my Windows 8 host machine I use "username@hostname" in Putty's Host Name field and it works flawlessly.
Does the Linux putty use a different syntax in the host name field? I checked around but couldn't find anything.