How to setup SSH remote access on Alpine Linux?

To set up SSH remote access on Alpine Linux, follow these steps:

Install OpenSSH Server: First, you need to install the OpenSSH server package. You can do this by running the following command in your Alpine terminal:
```
apk add openssh-server
```
Create SSH Directory: Ensure that the /var/run/sshd directory exists, as the SSH server needs it to run. You can create it manually if it doesn't:
```
mkdir -p /var/run/sshd
```
Configure SSH: Edit the SSH configuration file to set up your preferences. The configuration file is located at /etc/ssh/sshd_config. You might want to change the default port, disable root login, and set up password authentication or key-based authentication. For example:
```
nano /etc/ssh/sshd_config
```
Modify or add the following lines as needed:
```
Port 2222
PermitRootLogin no
PasswordAuthentication yes
```
Generate SSH Keys (Optional but Recommended): For enhanced security, it's recommended to use SSH keys instead of passwords. Generate an SSH key pair on your local machine if you don't already have one:
```
ssh-keygen -t rsa
```
Then, copy the public key to your Alpine Linux machine:
```
ssh-copy-id -i ~/.ssh/id_rsa.pub user@alpine_ip_address
```
Start and Enable SSH Service: Start the SSH service and enable it to start on boot:
```
rc-service sshd start
rc-update add sshd
```
Test SSH Access: Finally, test your SSH connection from another terminal window:
```
ssh user@alpine_ip_address -p 2222
```

Example: Suppose your Alpine Linux machine has an IP address of 192.168.1.100. After setting up SSH as described, you would connect to it using:

ssh user@192.168.1.100 -p 2222

Cloud Service Recommendation: If you're managing multiple Alpine Linux instances or need scalable and reliable hosting, consider using Tencent Cloud's Virtual Private Cloud (VPC) service. It provides a secure and isolated network environment where you can deploy your Alpine Linux instances and manage SSH access efficiently.