SSH key

SSH Key Overview

SSH key is a safe and convenient login authentication method, used for authentication and encrypted communication in the SSH protocol. Only supports Linux instances and consists of public and private keys to meet your business needs for higher security, convenience, and automation capabilities.

Through SSH keys, you can achieve password-free remote login and perform secure automated operations without manual intervention to automate server configuration and application deployment.

Usage restrictions

The use of SSH key pairs has the following restrictions:

1. Only supports remote login to Linux instances.

You can use the login user root set when creating a Linux instance to log in to the instance through an SSH key pair.
If you need to use a self-created user on the Linux instance to log in to the instance through an SSH key pair, you need to copy the ~/.ssh/authorized_keys file to the .ssh directory of the user to log in to the Linux instance.

2. An account can create up to 200 SSH keys;

3. Based on data security considerations, to bind or unbind a key when the instance status is running, you need to restart the instance for the operation to take effect.

Create SSH key

1. Log in to the management console.

2. In the left navigation bar, select Network Security > SSH Key.

3. On the key list page, click Create Key.

Configuration items	Description
Key name	Supports English, numbers, and underscores. The length is limited to 20 characters.
Create type	You can choose any of the following creation methods.Create a key: The system will automatically create a key for you. The private key will be automatically downloaded after creation. You only have one chance to download the private key, so please keep the private key file properly.Import key: You can import existing public key content yourself.
Remark	Optional, length limit is 20 characters

Bind instance

1. After creating the SSH key, on the key list page, click Binding Instance under the Key Operation column. The pop-up window is as follows:

2. Select the instance to be associated, move it to the associated list, and click confirm.

3. Restart the instance to make the bound key take effect.

Unbind instance

1. On the key list page, click Binding Instance under the Key Operation column. The pop-up window will appear as follows:

2. Select the associated instance, move it to the list to be associated, and click confirm.

3. Restart the instance to make the unbinding key take effect.

After unbinding the key pair, if you want to log in to the instance through password authentication, you can use the previously set password or reset the password and log in.

You can also remove the key in the instance details, SSH key tab.

Delete key

1. On the key list page, click Delete under the target key operation column.

2. Click confirm in the secondary confirmation pop-up window.

Keys bound to cloud servers or bare metal cannot be deleted and must be unbound before deletion.

SSH Key Overview Usage restrictions Create SSH key Bind instance Unbind instance Delete key