Disable SSH Auto Start

### **1. Connect to Your EC2 Instance**
First, connect to your EC2 instance via SSH:

ssh -i "D:awsk.pem" ubuntu@ec2-16-170-254-93.eu-north-1.compute.amazonaws.com

### **2. Stop the SSH Service**
Run the following command to stop the SSH service immediately:

sudo systemctl stop ssh

### **3. Disable SSH from Starting on Boot**
To prevent the SSH service from starting automatically on boot, disable it using:

sudo systemctl disable ssh

### **4. Confirm the Status**
Verify the status to ensure the service is inactive:

sudo systemctl status ssh

You should see an "inactive (dead)" status.

### **5. Update Security Group (Optional)**
If you won't be using SSH anymore, remove or restrict port `22` in the Security Group to prevent any unwanted access.

1. Go to the **AWS Management Console**.
2. Navigate to **EC2 > Security Groups**.
3. Find the security group attached to your instance.
4. Edit inbound rules and remove the rule for port `22`, or limit it to specific IPs if you still require occasional access.

Let me know if you need further assistance!

### **1. Stop the `yarn-service`**
Use the following command to stop the service immediately:

sudo systemctl stop yarn-service

### **2. Disable the Service from Auto-Starting**
To prevent the service from starting automatically on boot, disable it:

sudo systemctl disable yarn-service

### **3. Verify the Service is Stopped**
Check the status of the service to ensure it is no longer running:

sudo systemctl status yarn-service

You should see a status indicating that the service is inactive or stopped.

### **4. (Optional) Remove the Service**
If you no longer need the service, you can remove it entirely:

– Locate the service file, usually in `/etc/systemd/system/` or `/lib/systemd/system/`:

sudo rm /etc/systemd/system/yarn-service.service

– Reload the systemd daemon to reflect the changes:

sudo systemctl daemon-reload

– Ensure the service no longer exists:

sudo systemctl list-unit-files | grep yarn-service

Let me know if you need further assistance!

### **1. List All Active Services**
To display only the active services:

systemctl list-units --type=service --state=active

### **2. List All Services (Active, Inactive, Failed)**
To list all services, including active, inactive, and failed ones:

systemctl list-units --type=service

### **3. List All Installed Services (Enabled, Disabled)**
To show all installed service files and their status (enabled or disabled):

systemctl list-unit-files --type=service

### **4. List Services with Their Status**
To see detailed statuses of services:

sudo systemctl status

### **5. Filter Services by Name**
If you're looking for a specific service (e.g., `yarn-service`):

systemctl list-units --type=service | grep yarn-service

Let me know if you need further clarification!