kernel update checker

 cat kernel-update

 #!/bin/bash

# Function to fetch the latest kernel version from kernel.org
get_latest_kernel_version() {
    curl -s "https://www.kernel.org/finger_banner" | grep -oP '(?<=The latest stable version of the Linux kernel is:\s{13})\d+\.\d+.\d+'
}

# Function to compare two version numbers
compare_versions() {
    local IFS=.
    local ver1=($1)
    local ver2=($2)

    for ((i=0; i<${#ver1[@]} && i<${#ver2[@]}; i++)); do
        if ((10#${ver1[i]} > 10#${ver2[i]})); then
            echo 1  # Version 1 is greater
            return
        elif ((10#${ver1[i]} < 10#${ver2[i]})); then
            echo -1  # Version 2 is greater
            return
        fi
    done

    # If one version has more segments, it is greater
    if (( ${#ver1[@]} > ${#ver2[@]} )); then
        echo 1  # Version 1 is greater
    elif (( ${#ver1[@]} < ${#ver2[@]} )); then
        echo -1  # Version 2 is greater
    else
        echo 0  # Versions are equal
    fi
}



# Get the latest kernel version from kernel.org
latest_version=$(get_latest_kernel_version)

if [ -z "$latest_version" ]; then
    echo "Error: Unable to retrieve the latest kernel version from kernel.org."
    exit 1
fi

echo "Latest kernel version from kernel.org: $latest_version"

# Get the currently installed kernel version
current_version=$(uname -r)

echo "Currently installed kernel version: $current_version"

# Compare the versions
comparison_result=$(compare_versions "$current_version" "$latest_version")

if [ "$comparison_result" -eq 0 ]; then
    echo "Your system is up to date. No kernel update available."

elif [ "$comparison_result" -eq 1 ] || [ "$comparison_result" -eq -1 ]; then

    echo "A new kernel update is available!"

else
    echo "Your installed kernel version is unknown or not a valid version."

fi