Setting Static IP on CoreOS

1. Connect to CoreOS shell then type:
   

   sudo vi /etc/systemd/network/static.network

2. Set the static IP
   

   [Match]
   Name=eth0
   
   [Network]
   Address=10.0.0.16/24
   Gateway=10.0.0.1
   DNS=10.0.0.1
   

   
   
3. Apply the new network configuration:
   

   sudo systemctl restart systemd-networkd
   

   
   

Converting PuttyGen private key to OpenSsh in Ubuntu

I recently had a need to convert a private key generated in Windows 10 using PuttyGen. I am using the private key to connect to my remote server. When I log in to my Ubuntu box, I also would like to use the same private key. Here's what I did:

Convert ppk to OpenSsh format:

puttygen <path-to-your.ppk> -O private-openssh -o <path-to-your-private-key>

You will be prompted to enter your private key password (if you had it).

To use the converted private key to connect to the server:

ssh -i <path-to-your-private-key> <username@yourhost>