Create setup.sh, bash script to automate the setup in Linux based operating systems

setup.sh

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+#!/bin/bash
+
+# Function to check if a command exists
+command_exists() {
+    command -v "$1" >/dev/null 2>&1
+}
+
+# Check and install prerequisites
+install_prerequisites() {
+    if ! command_exists zsh; then
+        echo "Installing Zsh..."
+        if command_exists apt-get; then
+            sudo apt-get update && sudo apt-get install -y zsh
+        elif command_exists yum; then
+            sudo yum install -y zsh
+        elif command_exists brew; then
+            brew install zsh
+        else
+            echo "Error: Unable to install Zsh. Please install it manually."
+            exit 1
+        fi
+    fi
+
+    if ! command_exists git; then
+        echo "Installing Git..."
+        if command_exists apt-get; then
+            sudo apt-get update && sudo apt-get install -y git
+        elif command_exists yum; then
+            sudo yum install -y git
+        elif command_exists brew; then
+            brew install git
+        else
+            echo "Error: Unable to install Git. Please install it manually."
+            exit 1
+        fi
+    fi
+
+    if ! command_exists curl; then
+        echo "Installing curl..."
+        if command_exists apt-get; then
+            sudo apt-get update && sudo apt-get install -y curl
+        elif command_exists yum; then
+            sudo yum install -y curl
+        elif command_exists brew; then
+            brew install curl
+        else
+            echo "Error: Unable to install curl. Please install it manually."
+            exit 1
+        fi
+    fi
+}
+
+# Install Oh My Zsh
+install_oh_my_zsh() {
+    echo "Installing Oh My Zsh..."
+    sh -c "$(curl -fsSL https://raw.githubusercontent.com/ohmyzsh/ohmyzsh/master/tools/install.sh)" "" --unattended
+}
+
+# Set Zsh as default shell
+set_zsh_default() {
+    echo "Setting Zsh as default shell..."
+    chsh -s $(which zsh)
+}
+
+# Main function
+main() {
+    install_prerequisites
+    install_oh_my_zsh
+    set_zsh_default
+    echo "Oh My Zsh installation complete! Please restart your terminal or run 'zsh' to start using it."
+}
+
+# Run the main function
+main