get system info for linux or mac os

getsysteminfo.sh

#!/bin/bash

# Function to check if a command exists
command_exists() {
    type "$1" &> /dev/null
}

# Function to gather system information
function gather_system_info() {
    info="System Information Report\n"
    info+="Date: $(date)\n"
    info+="------------------------------\n"

    if command_exists hostname; then
        info+="Hostname:\n$(hostname)\n"
        info+="------------------------------\n"
    fi

    info+="System Overview:\n$(uname -a)\n"
    info+="------------------------------\n"

    if [[ "$OSTYPE" == "linux-gnu"* ]]; then
        # Linux specific commands
        if command_exists lscpu; then
            info+="CPU Information:\n$(lscpu)\n"
            info+="------------------------------\n"
        fi
        if command_exists free; then
            info+="Memory Information:\n$(free -h)\n"
            info+="------------------------------\n"
        fi
    elif [[ "$OSTYPE" == "darwin"* ]]; then
        # macOS specific commands
        info+="CPU Information:\n$(sysctl -n machdep.cpu.brand_string)\n"
        info+="Number of Cores:\n$(sysctl -n hw.ncpu)\n"
        info+="Memory Information:\n$(sysctl hw.memsize)\n"
        info+="GPU Information:\n$(system_profiler SPDisplaysDataType | grep 'Chipset Model:')\n"
        info+="------------------------------\n"
    fi

    if command_exists df; then
        info+="Disk Usage:\n$(df -h)\n"
        info+="------------------------------\n"
    fi

    if command_exists lsblk; then
        info+="Block Devices:\n$(lsblk)\n"
        info+="------------------------------\n"
    fi

    if command_exists ip; then
        info+="Network Configuration:\n$(ip addr)\n"
        info+="------------------------------\n"
    elif command_exists ifconfig; then
        info+="Network Configuration:\n$(ifconfig)\n"
        info+="------------------------------\n"
    fi

    if [[ "$OSTYPE" == "linux-gnu"* ]]; then
        if command_exists vcgencmd; then
            info+="GPU Memory Allocation:\n$(vcgencmd get_mem gpu)\n"
            info+="------------------------------\n"
        fi
    fi

    echo -e "$info"
}

# Function to prompt for saving or displaying the report
function save_or_display() {
    read -p "Do you want to save the report to a file or display on screen? (save/display) " answer
    case ${answer} in
        save )
            echo -e "$system_info" > system_report.txt
            echo "Report saved as system_report.txt"
        ;;
        display )
            echo -e "$system_info"
        ;;
        * )
            echo "Invalid option. Exiting."
            exit 1
        ;;
    esac
}

# Main script execution
system_info=$(gather_system_info)
save_or_display