The problem is not with your installation of CentOS, it is with the computer you are connecting from. Read the error log you pasted earlier, it tells you exactly what the problem is and how to remedy it: > > Add correct host key in /Users/andy/.ssh/known_hosts to get rid of this > message. > Offending ECDSA key in /Users/andy/.ssh/known_hosts:22 Open up the file /Users/andy/.ssh/known_hosts and delete line 22. On Thu, Apr 28, 2016 at 2:31 AM, Andreas Benzler <andreas at benzlerweb.de> wrote: > Same machine iMac for the last two weeks. > > Can work on virtual box Centos 7 > Usb drive installation Centos 7 works > > Fresh installation not on this laptop. > > > Am 28.04.2016 um 11:25 schrieb Earl A Ramirez <earlaramirez at gmail.com>: > > > > On 28 Apr 2016 11:24, "Andreas Benzler" <andreas at benzlerweb.de> wrote: > >> > >> sure > >>> Am 28.04.2016 um 11:16 schrieb Earl A Ramirez <earlaramirez at gmail.com > >: > >>> > >>> On 28 Apr 2016 11:11, "John R Pierce" <pierce at hogranch.com> wrote: > >>>> > >>>> On 4/28/2016 2:02 AM, Andreas Benzler wrote: > >>>>> > >>>>> what is wrong with the default sshd server. > >>>>> > >>>>> after retry to connect sshd - key changed from known hosts???? > >>>> > >>>> > >>>> I've installed centos a LOT of times, versions 5, 6, and 7, and never > > had > >>> any issues with the built in sshd service, and a variety of clients, > >>> including other linux ssh, putty and securecrt on windows, gui SCP/SFTP > >>> utilties(they use sshd too), freebsd ssh, solaris ssh, aix ssh. > >>>> > >>>> the "key changed from known_hosts" error happens if your client had > >>> previously connected with the same "user at hostname" on a previous > >>> installation of the server OS with a different ssh_host_key > >>>> > >>>> > >>>> you need to provide a lot more information if you expect a more > > specific > >>> answer from anyone, like what version of CentOS did you install, what > >>> client software you're using to connect to it, any pertinent background > >>> information like was this hostname previously used for a different OS > >>> install, etc etc. > >>>> > >>>> > >>>> > >>>> > >>>> > >>>> > >>>> -- > >>>> john r pierce, recycling bits in santa cruz > >>>> > >>>> _______________________________________________ > >>>> CentOS mailing list > >>>> CentOS at centos.org > >>>> https://lists.centos.org/mailman/listinfo/centos > >>> > >>> You installed the server with the same IP, you need to remove the entry > >>> from the known hosts, which is located in .ssh on the computer you are > >>> trying to connect to. > >>> _______________________________________________ > >>> CentOS mailing list > >>> CentOS at centos.org > >>> https://lists.centos.org/mailman/listinfo/centos > >> > >> _______________________________________________ > >> CentOS mailing list > >> CentOS at centos.org > >> https://lists.centos.org/mailman/listinfo/centos > > > > I meant the computer you are trying to connect from. > > _______________________________________________ > > CentOS mailing list > > CentOS at centos.org > > https://lists.centos.org/mailman/listinfo/centos > > _______________________________________________ > CentOS mailing list > CentOS at centos.org > https://lists.centos.org/mailman/listinfo/centos >