To access Linux-based server via an SSH-key, it is necessary to generate a key pair. The private part of the key is stored on the PC from which you connect, and the public part is placed on the Cloud Server. You can generate the key pair on your PC, place the public part in the control panel and use this key in the future. You can also generate a key at portal.servers.com. In this case, you will be given a private part of the key that is to save on your PC. Both options are considered below.