How to verify SSH access?

To verify SSH access to a remote host, you can follow these steps:

Open Your Terminal.
Use the SSH Command: Run the following command, replacing username with your actual username and target_host with the IP address or hostname of the remote server:
```
ssh username@target_host
```
Check for Successful Connection:
- If the connection is successful, you will be prompted for your password (if you are not using key-based authentication) or you will be logged in directly if you are using SSH keys.
- You should see a welcome message or the command prompt of the remote host.
Test Commands: Once logged in, you can run a simple command, such as:
```
whoami
```
This should return your username on the remote host, confirming that you have SSH access.
Check for Errors:
- If you encounter an error, note the message. Common errors include:
  - Connection refused: The SSH service may not be running on the target host.
  - Permission denied: Incorrect username or password, or issues with SSH keys.
  - Host key verification failed: The host key has changed or is not recognized.
Use Verbose Mode for More Information: If you are having trouble connecting, you can use verbose mode to get more details about the connection process:
```
ssh -v username@target_host
```
You can add more vs (up to three) for increased verbosity:
```
ssh -vvv username@target_host
```

By following these steps, you can verify SSH access and troubleshoot any issues that may arise.