# AWS Ec2

> Manage EC2 instances, AMIs, and auto-scaling groups. Configure security groups, key pairs, and instance types. Use when deploying compute resources on AWS.

- Skill: `majiayu000/aws-ec2` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds add majiayu000/aws-ec2`
- Raw SKILL.md: https://api.skillmd.com/api/skills/majiayu000/aws-ec2/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: DevOps & Infra
- License: MIT
- Author: majiayu000 (https://skillmd.com/u/majiayu000)
- Updated: 2026-09-09
- Page: https://skillmd.com/skills/majiayu000/aws-ec2

---


# AWS EC2

Deploy and manage Amazon EC2 compute instances.

## Launch Instance

```bash
aws ec2 run-instances \
  --image-id ami-0abcdef1234567890 \
  --instance-type t3.micro \
  --key-name my-key \
  --security-group-ids sg-12345678 \
  --subnet-id subnet-12345678 \
  --tag-specifications 'ResourceType=instance,Tags=[{Key=Name,Value=web-server}]'
```

## Auto Scaling

```bash
# Create launch template
aws ec2 create-launch-template \
  --launch-template-name web-template \
  --version-description v1 \
  --launch-template-data '{
    "ImageId": "ami-xxx",
    "InstanceType": "t3.micro"
  }'

# Create ASG
aws autoscaling create-auto-scaling-group \
  --auto-scaling-group-name web-asg \
  --launch-template LaunchTemplateName=web-template \
  --min-size 2 --max-size 10 --desired-capacity 2 \
  --vpc-zone-identifier "subnet-xxx,subnet-yyy"
```

## User Data

```bash
#!/bin/bash
yum update -y
yum install -y httpd
systemctl start httpd
systemctl enable httpd
```

## Instance Management

```bash
# List instances
aws ec2 describe-instances --filters "Name=tag:Name,Values=web*"

# Stop/Start
aws ec2 stop-instances --instance-ids i-xxx
aws ec2 start-instances --instance-ids i-xxx

# Create AMI
aws ec2 create-image --instance-id i-xxx --name "my-ami"
```

## Best Practices

- Use launch templates
- Implement auto-scaling
- Use spot instances for cost savings
- Regular AMI updates
- Instance metadata service v2

## Related Skills

- [terraform-aws](../terraform-aws/) - IaC deployment
- [aws-vpc](../aws-vpc/) - Networking