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We do not encourage any kind of illegal or harmful activity.

Step 1: Create the Script

1. Create the backdoor script with the necessary commands and actions: nano /path/to/your_script.sh

2. Make the script executable.
   chmod 755 /path/to/your_script.sh

3. Add the script to the default runlevels so it runs at startup: update-rc.d /path/to/your_script.sh defaults

Step 2: Verify Script Permissions and Path

1. Check the script permissions to ensure it is executable by the system: ls -l /path/to/your_script.sh
2. Confirm the script path and the shebang (#!/bin/bash) at the top of the script to specify the interpreter.

Step 3: Manual Method – Create a systemd Service (Alternative)

1. Create a new service file for your script in the systemd directory.
   nano /etc/systemd/system/your_service_name.service

2. Add the following content to the service file:

   [Unit]
   Description=Your Script Service
   After=network.target
   
   [Service]
   ExecStart=/path/to/your_script.sh
   ExecReload=/bin/kill -HUP $MAINPID
   ExecStop=/bin/kill -SIGINT $MAINPID
   Restart=on-failure
   User=root
   
   [Install]
   WantedBy=multi-user.target
   

3. Reload the systemd daemon to recognize the new service.
   systemctl daemon-reload

4. Enable the service so it starts on boot.
   systemctl enable your_service_name.service

5. Start the service immediately (optional).
   systemctl start your_service_name.service

Step 4: Verifying and Troubleshooting

1. Check the status of your service to ensure it’s running correctly: systemctl status your_service_name.service
2. View logs for any issues or errors.
   journalctl -u your_service_name.service
3. Check the runlevel symlinks to ensure your script is correctly linked: ls -l /etc/rc*.d/*your_script.sh