AWS Services — Complete Quick Reference Guide

# List buckets
aws s3 ls

# Copy file to bucket
aws s3 cp file.txt s3://my-bucket/

# Sync directory (one-way sync)
aws s3 sync ./dist s3://my-bucket/ --delete

# List objects
aws s3 ls s3://my-bucket/

# Presigned URL (temporary access)
aws s3 presign s3://my-bucket/file.txt --expires-in 3600

# Invoke function
aws lambda invoke --function-name my-function response.json

# Update code
aws lambda update-function-code \
  --function-name my-function \
  --zip-file fileb://function.zip

# List functions
aws lambda list-functions

# Get function configuration
aws lambda get-function-configuration --function-name my-function

# List instances
aws ec2 describe-instances

# Start/stop instances
aws ec2 start-instances --instance-ids i-1234567890abcdef0
aws ec2 stop-instances --instance-ids i-1234567890abcdef0

# Create security group
aws ec2 create-security-group \
  --group-name web-sg \
  --description "Web server security group"

# List tables
aws dynamodb list-tables

# Query table
aws dynamodb query \
  --table-name Users \
  --key-condition-expression "id = :id" \
  --expression-attribute-values '{":id":{"S":"user123"}}'

# Put item
aws dynamodb put-item \
  --table-name Users \
  --item '{"id":{"S":"user123"},"name":{"S":"Alice"}}'

{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Effect": "Allow",
      "Action": "s3:GetObject",
      "Resource": "arn:aws:s3:::my-bucket/*"
    }
  ]
}