A bash script that installs Zsh, Oh My Zsh, Powerlevel10k theme, and Zsh Autosuggestions with comments and colorful echo statements for Ubuntu. To directly install this, first run ```curl -O https://gist.githubusercontent.com/theprantadutta/68aed92bbdbc9e312c853885910e5196/raw/install-zsh.sh && chmod +x install-zsh.sh && ./install-zsh.sh```.

install-zsh.sh

#!/bin/bash

# Colors for echo statements
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
RED='\033[0;31m'
NC='\033[0m' # No Color

# Step 0: Check if the script is being run with sudo privileges
if [ "$(id -u)" -ne 0 ]; then
  echo -e "${RED}This script requires sudo privileges. Please run it with 'sudo' or as root.${NC}"
  exit 1
fi

echo -e "${GREEN}Starting the installation of Zsh, Oh My Zsh, Powerlevel10k, and Zsh Autosuggestions...${NC}"

# Step 1: Install Zsh
echo -e "${YELLOW}Installing Zsh...${NC}"
sudo apt update && sudo apt install -y zsh
echo -e "${GREEN}Zsh installation completed!${NC}"

# Step 2: Set Zsh as the default shell
echo -e "${YELLOW}Setting Zsh as the default shell...${NC}"
chsh -s $(which zsh)
echo -e "${GREEN}Zsh has been set as the default shell!${NC}"

# Start a new Zsh session to run the rest of the commands
echo -e "${YELLOW}Switching to Zsh for the remaining setup...${NC}"
zsh <<'EOF'

# Step 3: Install Oh My Zsh
echo -e "${YELLOW}Installing Oh My Zsh...${NC}"
sh -c "$(curl -fsSL https://raw.githubusercontent.com/ohmyzsh/ohmyzsh/master/tools/install.sh)"
echo -e "${GREEN}Oh My Zsh installed successfully!${NC}"

# Step 4: Install Powerlevel10k theme
echo -e "${YELLOW}Installing Powerlevel10k theme...${NC}"
git clone --depth=1 https://github.com/romkatv/powerlevel10k.git ${ZSH_CUSTOM:-$HOME/.oh-my-zsh/custom}/themes/powerlevel10k
echo -e "${GREEN}Powerlevel10k theme installed!${NC}"

# Step 5: Set Powerlevel10k as the default theme
echo -e "${YELLOW}Setting Powerlevel10k as the default theme in ~/.zshrc...${NC}"
if grep -q "ZSH_THEME=" ~/.zshrc; then
  # If ZSH_THEME exists, replace it
  sed -i 's/^ZSH_THEME=.*/ZSH_THEME="powerlevel10k\/powerlevel10k"/g' ~/.zshrc
else
  # If ZSH_THEME does not exist, append it
  echo 'ZSH_THEME="powerlevel10k/powerlevel10k"' >> ~/.zshrc
fi
echo -e "${GREEN}Powerlevel10k theme is now set as the default theme!${NC}"

# Step 6: Install Zsh Autosuggestions plugin
echo -e "${YELLOW}Installing Zsh Autosuggestions plugin...${NC}"
git clone https://github.com/zsh-users/zsh-autosuggestions ${ZSH_CUSTOM:-~/.oh-my-zsh/custom}/plugins/zsh-autosuggestions
echo -e "${GREEN}Zsh Autosuggestions plugin installed!${NC}"

# Step 7: Add Zsh Autosuggestions to the plugins list in ~/.zshrc
echo -e "${YELLOW}Adding Zsh Autosuggestions to the plugins list...${NC}"
if grep -q "plugins=(" ~/.zshrc; then
  # Add zsh-autosuggestions to the existing plugins list
  sed -i 's/plugins=(/plugins=(zsh-autosuggestions /' ~/.zshrc
else
  # If no plugins list is found, add it
  echo 'plugins=(git zsh-autosuggestions)' >> ~/.zshrc
fi
echo -e "${GREEN}Zsh Autosuggestions added to the plugins list!${NC}"

# Step 8: Apply changes
echo -e "${YELLOW}Applying the changes by reloading ~/.zshrc...${NC}"
source ~/.zshrc
echo -e "${GREEN}All done! Zsh with Powerlevel10k and Zsh Autosuggestions is now configured!${NC}"

# End of Zsh commands
EOF

echo -e "${YELLOW}Please restart your terminal to fully apply the changes.${NC}"

zsh