These instructions will work on any computer that uses OpenSSH such as macOS or most Linux/Unix systems. The process for generating keys on other platforms will vary but the general principle is the same.
- Open your Terminal app and generate a new key pair by typing
ssh-keygen at the shell prompt. You should see:
Generating public/private rsa key pair.
Enter file in which to save the key (/home/username/.ssh/id_rsa):
Press Enter to confirm the default location (that is,
~/.ssh/id_rsa) for the newly created key and the press enter twice more when prompted for a passphrase.
- After this, you will be presented with a message similar to this:
Your identification has been saved in /home/username/.ssh/id_rsa.
Your public key has been saved in /home/username/.ssh/id_rsa.pub.
The key fingerprint is:
The key's randomart image is:
+--[ RSA 2048]----+
| E. |
| . . |
| o . |
| . .|
| S . . |
| + o o ..|
| * * +oo|
| O +..=|
| o* o.|
- Change the permissions of the
~/.ssh/ directory to 700 to ensure it is only accessible by your user ID:
chmod 700 ~/.ssh
- Copy the content of
~/.ssh/id_rsa.pub into the
~/.ssh/authorized_keys on the machine to which you want to connect, appending it to its end if the file already exists.
- Set the permissions of the
~/.ssh/authorized_keys file using the following command:
chmod 600 ~/.ssh/authorized_keys
How to create an SSH shortcut
To create a custom ssh connection so you don’t need to type the IP address of your server every time, type from your home directory:
then enter the following below
Save the file and exit nano. You can now connect to the server using the command
ssh shortcutname without having to enter any additional connection information or password.
What is happening?
Over the coming weeks we will be migrating customers hosted out of our usa1 (Chicago) datacenter to a new datacenter facility which is also located in Chicago approx 2 miles away.
The new facility offers us higher power availability, better connectivity and more redundancy. We are also taking this opportunity to complete the roll-out of improved firewall and encryption subsystems on our virtualization hypervisors to further improve our cyber security defenses.
What is the impact?
Affected customer VMs will be migrated one by one to new hardware running in the new datacenter. Both facilities are connected by a VLAN which will facilitate seamless transition of IP traffic. No IP renumbering or other changes will be required. Once migration is complete you can expect lower latency, faster performance and better security.
Migration will require a brief disruption while we sync changed data and reboot VMs on new hardware. We will schedule migrations with affected customers individually at the most convenient time slots.
Please contact firstname.lastname@example.org if you have any questions about this migration.
Update Sunday 4th April 2021 21:00 UK / 20:00 UTC: This maintenance work has begun.
Update Sunday 4th April 2021 22:00 UK / 21:00 UTC: This maintenance work is taking a little longer than expected. It should be complete very soon. We will provide a further update within 20 minutes. Sorry for any inconvenience.
Update Sunday 4th April 2021 22:15 UK / 21:15 UTC: This maintenance work is now complete. Mail service will resume within a few minutes.
We will be conducting maintenance on our Hosted Email platform.
You will be unable to access your emails and / or send emails for a period of time during the below window.
Incoming emails will be queued for delivery by our spam filtering server and / or the sending mail server and be delivered shortly after normal service resumes.
Estimated start time: Sunday 4th April 2021 21:00 UK / 20:00 UTC
Estimated time of completion: Sunday 4th April 2021 22:00 UK / 21:00 UTC
We are very sorry for any inconvenience caused.
Please contact email@example.com if you have any queries relating to this maintenance.