docker-essentials

# Docker Essentials

Essential Docker commands for container and image management.

## Container Lifecycle

### Running containers
```bash
# Run container from image
docker run nginx

# Run in background (detached)
docker run -d nginx

# Run with name
docker run --name my-nginx -d nginx

# Run with port mapping
docker run -p 8080:80 -d nginx

# Run with environment variables
docker run -e MY_VAR=value -d app

# Run with volume mount
docker run -v /host/path:/container/path -d app

# Run with auto-remove on exit
docker run --rm alpine echo "Hello"

# Interactive terminal
docker run -it ubuntu bash
```

### Managing containers
```bash
# List running containers
docker ps

# List all containers (including stopped)
docker ps -a

# Stop container
docker stop container_name

# Start stopped container
docker start container_name

# Restart container
docker restart container_name

# Remove container
docker rm container_name

# Force remove running container
docker rm -f container_name

# Remove all stopped containers
docker container prune
```

## Container Inspection & Debugging

### Viewing logs
```bash
# Show logs
docker logs container_name

# Follow logs (like tail -f)
docker logs -f container_name

# Last 100 lines
docker logs --tail 100 container_name

# Logs with timestamps
docker logs -t container_name
```

### Executing commands
```bash
# Execute command in running container
docker exec container_name ls -la

# Interactive shell
docker exec -it container_name bash

# Execute as specific user
docker exec -u root -it container_name bash

# Execute with environment variable
docker exec -e VAR=value container_name env
```

### Inspection
```bash
# Inspect container details
docker inspect container_name

# Get specific field (JSON path)
docker inspect -f '{{.NetworkSettings.IPAddress}}' container_name

# View container stats
docker stats

# View specific container stats
docker stats container_name

# View processes in container
docker top container_name
```

## Image Man...