sudo apt update && sudo apt upgrade -y

curl -fsSL https://deb.nodesource.com/setup_22.x | sudo -E bash -

sudo apt install nodejs -y

node --version  # Should display v22.x.x
npm --version   # Should display 10.x.x or higher

sudo npm install -g @openai/codex@latest

codex --version  # Should display version number, e.g., 0.40.0

/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"

brew install node

npm install -g @openai/codex@latest

wsl --install

export OPEN_API_KEY="<YOUR_API_KEY>"

# Check your shell
echo $SHELL
# /bin/zsh or /bin bash

# For bash users
nano ~/.bashrc

# For zsh users
nano ~/.zshrc

export OPEN_API_KEY="<YOUR_API_KEY>"

# bash users
source ~/.bashrc

# zsh users
source ~/.zshrc

$env:OPEN_API_KEY = "<YOUR_API_KEY>"
$env:CODEX_DEFAULT_MODEL = "gpt-5-codex"
$env:CODEX_BACKUP_MODEL = "gpt-4.1"

# Restart PowerShell or reload your profile manually
. $PROFILE

model = "gpt-5-codex"
model_provider = "agcloud"
temperature = 0.7
max_tokens = 2000
model_reasoning_effort = "medium"

[model_providers.agcloud]
name = "OpenAI Compatible"
base_url = "https://aiandgpu.com/v1"
env_key = "OPEN_API_KEY"

wire_api = "responses"

model = "gpt-5-codex"
model_provider = "agcloud"
temperature = 0.7
max_tokens = 2000
model_reasoning_effort = "medium"

[model_providers.agcloud]
name = "OpenAI Compatible"
base_url = "https://aiandgpu.com/v1"
env_key = "OPEN_API_KEY"

wire_api = "responses"

[ui]
theme = "dark"  # or "light"
show_token_count = true

# Navigate to project directory
cd /path/to/your/project

# Start Codex
codex

codex "Fix this bug: add error handling at line 42 in main.py"

codex -m gpt-4 "Build a simple web server"

codex --mode full-auto "Deploy ML model to Vercel"

# Start interactive session
codex

# Use commands in interactive mode
> Help me refactor this function
> Add unit tests
> Optimize performance

codex "Create a Python function to calculate the nth Fibonacci number"

codex "Review auth.js file and find potential security issues"

codex "Fix memory leak issue in app.py"

codex "Generate complete unit tests for user_service.py"

codex "Generate API documentation for the entire project"

# Method 1: Use sudo
sudo npm install -g @openai/codex

# Method 2: Modify npm global directory permissions (recommended)
mkdir ~/.npm-global
npm config set prefix '~/.npm-global'
echo 'export PATH=~/.npm-global/bin:$PATH' >> ~/.bashrc
source ~/.bashrc

# Use nvm to manage Node.js versions
curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.39.0/install.sh | bash
nvm install 22
nvm use 22

# Check environment variable
echo $OPEN_API_KEY

# Reset API Key
export OPEN_API_KEY="<YOUR_API_KEY>"

# Verify configuration
codex --help

# Select specific model in terminal
codex --model gpt-5-codex

# Or switch other model in codex CLI
/model

# Check environment variable
echo $OPEN_API_KEY

# Check Codex configuration
codex --help

# Test API connection
codex "Hello, Codex!"

# View version information
codex --version

# View configuration file
cat ~/.codex/config.toml

# Enable debug mode
export DEBUG=codex:*
codex "test command"

# View log file
tail -f ~/.codex/logs/codex.log

# ~/.codex/templates/review.txt
Please review the following code, focusing on:
1. Code readability and maintainability
2. Performance optimization opportunities
3. Potential security vulnerabilities
4. Whether it follows best practices

# Use template
codex --template review.txt file.py

# Batch process multiple files
for file in src/*.py; do
    codex "Add type annotations to $file"
done

# Review uncommitted changes
git diff | codex "Review these code changes"

# Generate commit message
git diff --cached | codex "Generate a clear commit message"

alias cdx="codex"
alias cdx-review="codex --mode review"
alias cdx-test="codex --mode test"
alias cdx-doc="codex --mode documentation"