You can create a Bash script to automate the installation of Git LFS on a Linux system. Here's a sample script for this purpose [1][2]:

#!/bin/bash

# Check if Git LFS is already installed
if git-lfs --version &> /dev/null; then
    echo "Git LFS is already installed."
else
    # Check if Git is installed
    if ! git --version &> /dev/null; then
        echo "Git is not installed. Please install Git first."
        exit 1
    fi

    # Install Git LFS
    echo "Installing Git LFS..."
    curl -s https://packagecloud.io/install/repositories/github/git-lfs/script.deb.sh | sudo bash
    sudo apt-get install git-lfs
    git lfs install

    echo "Git LFS has been installed."
fi

This script performs the following steps:
* It checks if Git LFS is already installed by attempting to run git-lfs --version. If Git LFS is already installed, it prints a message and exits.
* If Git LFS is not installed, it then checks if Git is installed by running git --version. If Git is not installed, it prints an error message and exits.
* If Git is installed, it proceeds to install Git LFS. The script uses the official Git LFS installation script for Linux systems and installs Git LFS using apt-get (assuming a Debian-based system). If you are using a different package manager or Linux distribution, you may need to adapt the installation steps accordingly.
* Finally, it runs git lfs install to initialize Git LFS.

Make sure to make the script executable with `chmod +x install_git_lfs.sh` and then run it with ``./install_git_lfs.sh`` to automate the installation of Git LFS.