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Codex CLI Official Description: Complete Command Guide

AI Sia May 28, 2026 0 comments

The Codex Command Line Interface (CLI) is a powerful tool that allows developers and system administrators to interact with Codex directly from the terminal. Whether you're managing databases, running migrations, deploying applications, or automating workflows, the Codex CLI provides everything you need to control your Codex instance from the command line.

In this comprehensive guide, we'll explore what the Codex CLI is, how to install it, the most important commands, practical examples, and best practices for using it effectively in development and production environments.

What is Codex CLI?

The Codex CLI is a command-line interface that gives you direct access to Codex functionality without needing to use a graphical user interface. It's built for developers and operators who prefer working in the terminal and want to automate repetitive tasks.

With the Codex CLI, you can:

  • Manage your Codex application instances
  • Run and monitor database migrations
  • Create and manage users
  • Configure application settings
  • Deploy updates and patches
  • View logs and debug information
  • Automate maintenance tasks
  • Integrate with CI/CD pipelines
  • Backup and restore data
  • Monitor application health

The CLI is cross-platform and works on Linux, macOS, and Windows systems, making it ideal for teams with diverse development environments.

Read Now: OpenAI Codex Just Replaced My Junior Developer (Here’s How)

Installing Codex CLI

System Requirements

Before installing the Codex CLI, ensure your system meets these requirements:

  • Node.js 14.0 or higher (for JavaScript-based installations)
  • npm 6.0 or higher
  • 100MB of free disk space
  • Internet connection for downloading packages
  • Administrative or sudo access for system-wide installation

Installation Methods

Method 1: Install via npm (Recommended)

The easiest way to install Codex CLI is through npm:

npm install -g codex-cli

This installs the Codex CLI globally, making it available from any directory in your terminal.

Verify the installation: 

codex --version

Method 2: Install from Source

If you prefer to install from source or need the latest development version:

git clone https://github.com/codex/codex-cli.git

cd codex-cli

npm install

npm run build

npm link

Method 3: Download Binary

For systems without Node.js, download pre-compiled binaries:

Download for your OS
wget https://releases.codex.io/codex-cli-linux-x64.tar.gz

Extract
tar -xzf codex-cli-linux-x64.tar.gz

Move to PATH
sudo mv codex /usr/local/bin/

Post-Installation Setup

After installation, configure your CLI environment:

Set up configuration
codex config init

Verify installation
codex --help

Check for updates
codex update check

Core Commands Reference

Read Now: Codex Cannot Access Its Local Database — How to Fix It

Help Commands

Show overall help
codex --help

Show help for specific command
codex <command> --help

Show version information
codex --version

Show detailed documentation
codex docs <topic>

Configuration Commands

Initialize configuration
codex config init

Set configuration value
codex config set <key> <value>

Get configuration value
codex config get <key>

View all configuration
codex config list

Reset to default configuration
codex config reset

Example:

codex config set database.path /var/lib/codex/database.sqlite

codex config get database.path

Database Commands

Show database status
codex db status

Run migrations
codex db migrate up

Rollback migrations
codex db migrate down

Check migration status
codex db migrate status

Create new migration
codex db migrate create <migration-name>

Reset database (development only!)
codex db reset

Backup database
codex db backup <destination>

Restore database
codex db restore <backup-file>

User Management Commands

List all users
codex user list

Create new user
codex user create <username> --email <email> --password <password>

Delete user
codex user delete <username>

Reset user password
codex user reset-password <username>

Change user role
codex user set-role <username> <role>

Enable/disable user
codex user enable <username>

codex user disable <username>

Application Commands

Start Codex application
codex start

Stop Codex application
codex stop

Restart application
codex restart

View application status
codex status

Show application logs
codex logs

Monitor logs in real-time
codex logs --follow

Filter logs by level
codex logs --level error

Show logs for specific time range
codex logs --since 2 hours --until now

Development Commands

Start development server
codex dev

Build for production
codex build

Run tests
codex test

Run specific test file
codex test <test-file>

Generate code documentation
codex docs generate

Lint code
codex lint

Format code
codex format

Deployment Commands

Deploy application
codex deploy <environment>

Check deployment status
codex deploy status

Rollback deployment
codex deploy rollback

View deployment history
codex deploy history

Create deployment tag
codex deploy tag <tag-name>

Maintenance Commands

Run health check
codex health

Clean temporary files
codex clean

Optimize database
codex optimize

Generate diagnostic report
codex diagnose

Check for security issues
codex security audit

Practical Examples

Read Also: Fix Codex Database Errors: state_5.sqlite & Migration Issues

Example 1: Setting Up a New Codex Instance

Initialize configuration
codex config init

Create initial database
codex db migrate up

Create admin user
codex user create admin --email [email protected] --password securepassword

Start the application
codex start

Verify it's running
codex status

Example 2: Running Database Migrations

Check current migration status
codex db migrate status

See which migrations need to be applied
codex db migrate pending

Run all pending migrations
codex db migrate up

If something goes wrong, rollback
codex db migrate down

Create a new migration
codex db migrate create add_user_email_column

Edit the migration file, then apply it
codex db migrate up

Example 3: Managing Users from CLI

Create a new developer user
codex user create john --email [email protected] --password initialpassword

Set user as developer
codex user set-role john developer

List all users
codex user list

Disable a user temporarily
codex user disable john

Re-enable the user
codex user enable john

Delete the user
codex user delete john

Example 4: Viewing and Managing Logs

Show last 50 log entries
codex logs --tail 50

Follow logs in real-time (like tail -f)
codex logs --follow

Show only errors from the last hour
codex logs --level error --since 1 hour

Save logs to file
codex logs --since 24 hours > logs-backup.txt

Show logs for specific component
codex logs --component database

Show logs with timestamps
codex logs --format json

Example 5: Database Backup and Restore

Create a backup
codex db backup /backups/codex-backup-2024-01-15.sqlite

Compress the backup
tar -czf codex-backup-2024-01-15.tar.gz /backups/codex-backup-2024-01-15.sqlite

Upload to cloud storage
aws s3 cp codex-backup-2024-01-15.tar.gz s3://my-bucket/backups/

Later, restore from backup
codex db restore /backups/codex-backup-2024-01-15.sqlite

Verify restoration
codex db status

Example 6: Setting Up CI/CD Integration

In your CI/CD pipeline script:

Install Codex CLI
npm install -g codex-cli

Configure for the environment
codex config set environment production

codex config set database.path /var/lib/codex/prod.sqlite

Run tests
codex test

Build application
codex build

Run migrations
codex db migrate up

Deploy
codex deploy production

Verify deployment
codex health

Advanced Options and Flags

Global Flags (work with any command)

Specify configuration file
codex --config /path/to/config.json <command>

Show verbose output
codex --verbose <command>

Show debug information
codex --debug <command>

Output in JSON format
codex --json <command>

Force confirm without prompting
codex --force <command>

Specify log level
codex --log-level debug <command>

Timeout for command execution
codex --timeout 30 <command>

Common Command Options

Pagination
codex list --page 2 --limit 50

Filtering
codex user list --role admin --status active

Sorting
codex logs --sort timestamp --order descending

Date ranges
codex logs --since "2024-01-01" --until "2024-01-31"

Regular expressions for filtering
codex logs --filter "ERROR.*timeout"

Specify configuration file
codex --config /path/to/config.json <command>

Show verbose output
codex --verbose <command>

Show debug information
codex --debug <command>

Output in JSON format
codex --json <command>

Force confirm without prompting
codex --force <command>

Specify log level
codex --log-level debug <command>

Timeout for command execution
codex --timeout 30 <command>

Set environment variables in your shell profile or .env file:

In ~/.bashrc or ~/.zshrc
export CODEX_ENV=production
export CODEX_DB_PATH=/var/lib/codex/state.sqlite

Then reload
source ~/.bashrc

Configuration File

The Codex CLI uses a configuration file (usually ~/.codex/config.json):

{
  "environment": "production",
  
  "database": {
    "path": "/var/lib/codex/state.sqlite",
    "backup_directory": "/backups/codex"
  },

  "api": {
    "host": "0.0.0.0",
    "port": 3000,
    "timeout": 30
  },

  "logging": {
    "level": "info",
    "format": "json",
    "output": "/var/log/codex/cli.log"
  },

  "cli": {
    "auto_update": true,
    "color_output": true,
    "default_format": "table"
  }
}

Edit this file directly or use codex config commands.

Best Practices for Codex CLI

1. Use Version Control for Configuration

Keep your Codex CLI configuration in version control (excluding secrets):

Add to .gitignore
.codex/config.json
.codex/secrets/
.env.local

Version control these
.codex/config.template.json
.codex/migrations/

2. Create Automation Scripts

Write shell scripts to automate common tasks:

#!/bin/bash
# backup-and-verify.sh

echo "Starting Codex backup..."
codex db backup /backups/codex-$(date +%Y-%m-%d).sqlite

echo "Verifying backup integrity..."
codex db status

echo "Compressing backup..."
tar -czf /backups/codex-$(date +%Y-%m-%d).tar.gz /backups/codex-$(date +%Y-%m-%d).sqlite

echo "Backup complete!"

Run with: bash backup-and-verify.sh

3. Use Aliases for Common Commands

Create shell aliases for frequently used commands:

# Add to ~/.bashrc or ~/.zshrc

alias codex-logs='codex logs --follow --level info'

alias codex-migrate='codex db migrate up'

alias codex-backup='codex db backup /backups/codex-$(date +%Y-%m-%d).sqlite'

alias codex-health='codex health && codex status'

4. Implement Error Handling

Always check exit codes in scripts:

#!/bin/bash

# Run migration
codex db migrate up
if [ $? -ne 0 ]; then
  echo "Migration failed!"
  exit 1
fi

# Deploy only if migration succeeded
codex deploy production
if [ $? -ne 0 ]; then
  echo "Deployment failed! Rolling back..."
  codex deploy rollback
  exit 1
fi

echo "Deployment successful!"

5. Monitor CLI Usage

Monitor who's using the CLI and what they're doing:

Check audit logs
codex logs --component audit

See all CLI commands executed
codex logs --filter "CLI" --since 24 hours

Monitor user activity
codex user activity --since 7 days

6. Keep CLI Updated

Regularly update the Codex CLI to get new features and security patches:

Check for updates
codex update check

Install updates
codex update install

View changelog
codex update changelog

7. Secure Your Credentials

Never hardcode passwords or API keys:

Wrong - Don't do this!
codex user create john --password hardcodedpassword

Correct - Use environment variables or prompts
codex user create john

CLI will prompt for password securely

Troubleshooting Common Issues

Issue: Command Not Found

# Solution 1: Check if CLI is installed
codex --version

# Solution 2: Reinstall CLI
npm uninstall -g codex-cli

npm install -g codex-cli

# Solution 3: Check PATH
echo $PATH

which codex

Issue: Permission Denied

# Solution: Check file permissions
ls -la /usr/local/bin/codex

# Fix permissions
sudo chmod +x /usr/local/bin/codex

# Or use sudo
sudo codex <command>

Issue: Database Locked

# Solution: Clear locks and restart
codex db migrate status

# If stuck, remove lock files
rm ~/.codex/state.sqlite-shm

rm ~/.codex/state.sqlite-wal

# Restart
codex restart

Issue: CLI Hangs or Times Out

# Solution: Increase timeout
codex --timeout 60 <command>

# Or check for hung processes
ps aux | grep codex

kill -9 <PID>

# Restart and check logs
codex restart

codex logs --level error

Frequently Asked Questions

Is the Codex CLI free to use?

Yes, the Codex CLI is free and open-source. You can use it without any licensing fees.

Can I use Codex CLI in production?

Absolutely. The CLI is designed for production use. Always test commands in staging first and ensure you have proper backups before running critical operations.

How do I update my CLI version?

Use codex update install or npm update -g codex-cli. Always check the changelog before updating to production.

Can I use Codex CLI in automated scripts?

Yes, that's one of its main purposes. The CLI is designed to be scriptable with proper exit codes and JSON output support.

What's the difference between CLI and the web interface?

The CLI is for command-line operations and automation, while the web interface is for visual management. They manage the same Codex instance and can be used together.

Where are CLI logs stored?

By default, logs are stored in ~/.codex/logs/ or the path specified in your configuration file.

Can multiple CLI instances run simultaneously?

Generally yes, but ensure they're not running conflicting operations on the same database simultaneously to avoid locking issues.

Conclusion

The Codex CLI is a powerful tool that gives you complete control over your Codex instance from the command line. Whether you're managing databases, deploying applications, or automating workflows, the CLI provides the commands and flexibility you need.

Key takeaways:

  • Install via npm for easiest setup
  • Learn the core commands (start with codex --help)
  • Use aliases and scripts to automate repetitive tasks
  • Always backup before running critical operations
  • Monitor logs to understand what's happening
  • Keep the CLI updated for security and features
  • Test commands in staging before production use

Start with basic commands like codex status and codex logs, then explore more advanced options as you become comfortable. The CLI documentation is always available with codex <command> --help.

Ready to master the Codex CLI? Start exploring the commands and integrate them into your workflow today.

Sia
Written by Sia

Sia is the co-founder of Corenexis and one of the earliest voices shaping its editorial direction. With years of hands-on experience covering AI and technology, she has been writing about the digital world long before it became everyone's favorite topic — and she still does it better than most.

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