ec2 instance, al2023 ver 2.3, have installed telnet-server.x86_64, THERE IS NO STARTUP SCRIPT

Hello, Greetings.

Thank you for reaching out. The main issue here seems to be that you have installed the telnet-server.x86_64 package on your Amazon Linux 2023 (AL2023) EC2 instance, but you cannot find the startup script to configure it during instance boot.

The telnet-server package in AL2023 does not come with a default startup script. You will need to manually create a startup script to start the telnet server when the instance boots up.

You can create a new file in the directory /etc/cloud/cloud.cfg.d/telnet-server.cfg, and add the necessary commands to start the telnet server.

• The startup script should contain commands like systemctl enable telnet.socket and systemctl start telnet.socket to enable and start the telnet server service.

Take a backup in the form of snapshot or AMI before making any changes.

Example Script:

# cloud-init configuration to enable telnet service at boot
runcmd:
  - systemctl enable telnet.socket
  - systemctl start telnet.socket

Important Note: The Cloud-Init is designed primarily to run during the initial boot of a system, typically when the system is first launched or deployed, thus you would have to force Cloud-Init to run after the first boot using the following commands:

sudo cloud-init clean
sudo cloud-init init
reboot