I've read a lot online about how the "known_hosts" file works and why it's there. I've been using Linux for many years...Ubuntu, Suse, and RedHat flavors. I'm currently working with two Ubuntu machines that, I thought, were configured the same way. One is my home media server (HS)...music, movies, etc...the other is a "NAS" machine of sorts that makes a backup (changes) of HS on a daily basis using "rsync". Needless to say, remote access via CLI is important and I use ssh to accomplish that from my Macbook Air. The weird issue I have is that "ssh" seems to work differently on both the Ubuntu machines even though I was pretty sure I configured them the same. If I ssh from my Macbook Air or the NAS machine to HS, I get the normal ssh interaction where the first time I get the typical challenge to confirm...either Yes or No...that I trust the machine...(eg. Authenticity of host can't be established). From that point on, I don't get that challenge again...no problem there. But, if I ssh from the HS Ubuntu machine to my NAS machine, I continue to get the challenge regardless of the number of times I ssh into the NAS machine. I removed the "known_hosts" file on both machines and checked the permissions but still get the unusual behavior from HS to the NAS machine but not in the other direction...NAS to HS. I don't want to change the global variable that causes the initial challenge that ultimately updates the known_hosts file. I'll also mention that it appears to be updating the known_hosts file. Only thing I can think is the key is being changed for some reason each time I ssh into the NAS machine. Any help would be appreciated. Thanks in advance!
Jeff
Jeff