Automate telnet login

telnet.sh

#!/bin/bash
# This script is generated by chatgpt for telnet auto-login.

if [ $# -eq 0 ]; then
  echo "Usage: $0 <host>"
  exit 1
fi

host=$1
user=$(grep -A 2 "Host $host" ~/.ssh/config | grep User | awk '{print $2}')
password=$(grep -A 2 "Host $host" ~/.ssh/config | grep Password | sed 's/#//' | awk '{print $2}')

if [ -n "$user" ] && [ -n "$password" ]; then
  expect -c "
    spawn telnet $host
    expect \"login:\"
    send \"$user\r\"
    expect \"Password:\"
    send \"$password\r\"
    interact
  "
else
  telnet $host
fi