To disable password-based authentication in SSH and only allow key-based authentication for added security, you need to make the following changes in the SSH server configuration file:

1. Open the SSH daemon configuration file by typing the following command in the terminal:
```bash
sudo nano /etc/ssh/sshd_config
```
2. Find the line that includes `PasswordAuthentication`. You can do this by using the search function in the nano editor, which is accessed by pressing `Ctrl+W`.

3. Once you've found the line, change its value to `no`. If the line is commented out (i.e., if it starts with a `#`), you'll need to uncomment it by deleting the `#`. The line should look like this:
```bash
PasswordAuthentication no
```
4. Similarly, find the line that includes `UsePAM` and change its value to `no`. The line should look like this:
```bash
UsePAM no
```
5. After making these changes, save and close the file by pressing `Ctrl+X`, then `Y`, then `Enter`.

6. Finally, restart the SSH service for the changes to take effect. You can do this by typing the following command in the terminal:
```bash
sudo systemctl restart ssh
```
Please note that you should already have set up key-based authentication before disabling password authentication, otherwise you may lock yourself out of the server.

Question

To disable password-based authentication in SSH and only allow key-based authentication for added security, you need to make the following changes in the SSH server configuration file:

1. Open the SSH daemon configuration file by typing the following command in the terminal:
```bash
sudo nano /etc/ssh/sshd_config
```
2. Find the line that includes `PasswordAuthentication`. You can do this by using the search function in the nano editor, which is accessed by pressing `Ctrl+W`.

3. Once you've found the line, change its value to `no`. If the line is commented out (i.e., if it starts with a `#`), you'll need to uncomment it by deleting the `#`. The line should look like this:
```bash
PasswordAuthentication no
```
4. Similarly, find the line that includes `UsePAM` and change its value to `no`. The line should look like this:
```bash
UsePAM no
```
5. After making these changes, save and close the file by pressing `Ctrl+X`, then `Y`, then `Enter`.

6. Finally, restart the SSH service for the changes to take effect. You can do this by typing the following command in the terminal:
```bash
sudo systemctl restart ssh
```
Please note that you should already have set up key-based authentication before disabling password authentication, otherwise you may lock yourself out of the server.

Knowee AI · Accepted Answer

To disable password-based authentication in SSH and only allow key-based authentication for added security, you need to make the following changes in the SSH server configuration file:

1. Open the SSH daemon configuration file by typing the following command in the terminal:
```bash
sudo nano /etc/ssh/sshd_config
```
2. Find the line that includes `PasswordAuthentication`. You can do this by using the search function in the nano editor, which is accessed by pressing `Ctrl+W`.

3. Once you've found the line, change its value to `no`. If the line is commented out (i.e., if it starts with a `#`), you'll need to uncomment it by deleting the `#`. The line should look like this:
```bash
PasswordAuthentication no
```
4. Similarly, find the line that includes `UsePAM` and change its value to `no`. The line should look like this:
```bash
UsePAM no
```
5. After making these changes, save and close the file by pressing `Ctrl+X`, then `Y`, then `Enter`.

6. Finally, restart the SSH service for the changes to take effect. You can do this by typing the following command in the terminal:
```bash
sudo systemctl restart ssh
```
Please note that you should already have set up key-based authentication before disabling password authentication, otherwise you may lock yourself out of the server.

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