Ssh – How do to upgrade OpenSSH remotely via ssh command line

There's nothing that dictates that Fedora is unsuited for use on servers, nor is there anything that dictates that "server distros" is the only choice for servers. It depends on your particular needs.

What you may gain from using the "server distros" is:

• long term support
• stable API's (little to no version-upgrades of libraries and applications)
• backported securityfixes and bugfixes
• paid support

My main "complaint" for the server-distros is that software/libraries tend to to be somewhat old, and the range of supported packages is much smaller than community driven efforts.

I.e. the long term support and the non-changing API's is something that commercial software vendors love, they won't have to rebuild their application for the newest libraries because the API suddenly changed. They can develop for Vendor Y Release X and know that this platform will be around for several years to come.

Don't use a password. Generate a passphrase-less SSH key and push it to your VM.

If you already have an SSH key, you can skip this step… Just hit Enter for the key and both passphrases:

$ ssh-keygen -t rsa -b 2048
Generating public/private rsa key pair.
Enter file in which to save the key (/home/username/.ssh/id_rsa):
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /home/username/.ssh/id_rsa.
Your public key has been saved in /home/username/.ssh/id_rsa.pub.

Copy your keys to the target server:

$ ssh-copy-id id@server
id@server's password:

Now try logging into the machine, with ssh 'id@server', and check-in:

.ssh/authorized_keys

Note: If you don't have .ssh dir and authorized_keys file, you need to create it first

to make sure we haven’t added extra keys that you weren’t expecting.

Finally, check to log in…

$ ssh id@server

id@server:~$

You may also want to look into using ssh-agent if you want to try keeping your keys protected with a passphrase.