script to create on debian newt services

[pippo73]

I know it is not a big thing, but I would like to share with others this litle script to create the service on my debian servers

#!/bin/bash

#set -x

# Check if the user is root
if [ "$EUID" -ne 0 ]; then
  echo "This script must be run as root. Use sudo."
  exit 1
fi

# Check if the file /usr/local/bin/newt exists and is executable
if [ -e /usr/local/bin/newt ]; then
  if [ -x /usr/local/bin/newt ]; then
    echo "The file /usr/local/bin/newt exists and is executable. All good."
  else
    echo "The file /usr/local/bin/newt exists but is not executable."
    echo "Changing permissions to make it executable..."
    chmod +x /usr/local/bin/newt
    if [ $? -eq 0 ]; then
      echo "Permissions updated successfully: the file is now executable."
    else
      echo "Error: unable to update permissions of /usr/local/bin/newt."
      exit 1
    fi
  fi
else
  echo "The file /usr/local/bin/newt does not exist. Run the following command:"
  echo "curl -fsSL https://digpangolin.com/get-newt.sh | bash"
  exit 0
fi

# Request the 3 variables as input
read -p "Enter the ID: " ID
read -p "Enter the SECRET: " SECRET
read -p "Enter the ENDPOINT: " ENDPOINT

# Ask if client connections should be accepted
default_accept="n"
read -p "Should it be reachable by client connections? (y/N): " ACCEPT
ACCEPT=${ACCEPT:-$default_accept}

# Verify that all variables are set
if [ -z "$ID" ] || [ -z "$SECRET" ] || [ -z "$ENDPOINT" ]; then
  echo "Error: All variables are mandatory."
  exit 1
fi

# Create the user 'newt' and add it to the 'daemon' group
useradd -s /usr/sbin/nologin -G daemon newt

# Check if the user was created successfully
if [ $? -eq 0 ]; then
  echo "User 'newt' created and added to the 'daemon' group."
else
  echo "Error creating the user 'newt'."
  exit 1
fi

# Create the systemd service file for newt
SERVICE_FILE=/etc/systemd/system/newt.service

echo "Creating the service file $SERVICE_FILE..."

# Build the ExecStart string based on the choice
EXEC_CMD="/usr/local/bin/newt --id ${ID} --secret ${SECRET} --endpoint ${ENDPOINT}"
if [[ "$ACCEPT" == "y" || "$ACCEPT" == "Y" ]]; then
  EXEC_CMD+=" --accept-clients"
fi

cat <<EOF > $SERVICE_FILE
[Unit]
Description=Newt VPN Client
After=network.target

[Service]
ExecStart=${EXEC_CMD}
Restart=always
User=newt

[Install]
WantedBy=multi-user.target
EOF

# Verify that the service file was created
if [ -f "$SERVICE_FILE" ]; then
  echo "Service file successfully created at $SERVICE_FILE."
else
  echo "Error: unable to create the service file

hope it could help also others :-)

[pippo73]

feel free to modify it and make it better ;)