# Cheat Sheet #day18 - Amazon EC2 Commands

### Amazon EC2 Commands Cheat Sheet

Amazon EC2 (Elastic Compute Cloud) allows you to launch and manage virtual servers in the cloud. Below is a cheat sheet of common Amazon EC2 commands using the AWS CLI (Command Line Interface).

#### Setup

* **Configure AWS CLI**
    
    ```bash
    aws configure
    ```
    
    This command will prompt you to enter your AWS Access Key, Secret Key, region, and output format.
    

#### EC2 Instances

* **Launch a New EC2 Instance**
    
    ```bash
    aws ec2 run-instances --image-id ami-0abcdef1234567890 --count 1 --instance-type t2.micro --key-name MyKeyPair --security-group-ids sg-12345678 --subnet-id subnet-6e7f829e
    ```
    
* **List EC2 Instances**
    
    ```bash
    aws ec2 describe-instances
    ```
    
* **Start an EC2 Instance**
    
    ```bash
    aws ec2 start-instances --instance-ids i-1234567890abcdef0
    ```
    
* **Stop an EC2 Instance**
    
    ```bash
    aws ec2 stop-instances --instance-ids i-1234567890abcdef0
    ```
    
* **Reboot an EC2 Instance**
    
    ```bash
    aws ec2 reboot-instances --instance-ids i-1234567890abcdef0
    ```
    
* **Terminate an EC2 Instance**
    
    ```bash
    aws ec2 terminate-instances --instance-ids i-1234567890abcdef0
    ```
    

#### Security Groups

* **Create a Security Group**
    
    ```bash
    aws ec2 create-security-group --group-name MySecurityGroup --description "My security group"
    ```
    
* **List Security Groups**
    
    ```bash
    aws ec2 describe-security-groups
    ```
    
* **Add an Inbound Rule to a Security Group**
    
    ```bash
    aws ec2 authorize-security-group-ingress --group-id sg-12345678 --protocol tcp --port 22 --cidr 0.0.0.0/0
    ```
    
* **Remove an Inbound Rule from a Security Group**
    
    ```bash
    aws ec2 revoke-security-group-ingress --group-id sg-12345678 --protocol tcp --port 22 --cidr 0.0.0.0/0
    ```
    

#### Key Pairs

* **Create a Key Pair**
    
    ```bash
    aws ec2 create-key-pair --key-name MyKeyPair --query 'KeyMaterial' --output text > MyKeyPair.pem
    ```
    
* **List Key Pairs**
    
    ```bash
    aws ec2 describe-key-pairs
    ```
    
* **Delete a Key Pair**
    
    ```bash
    aws ec2 delete-key-pair --key-name MyKeyPair
    ```
    

#### Elastic IP Addresses

* **Allocate a New Elastic IP Address**
    
    ```bash
    aws ec2 allocate-address
    ```
    
* **Associate an Elastic IP Address with an Instance**
    
    ```bash
    aws ec2 associate-address --instance-id i-1234567890abcdef0 --allocation-id eipalloc-12345678
    ```
    
* **Disassociate an Elastic IP Address**
    
    ```bash
    aws ec2 disassociate-address --association-id eipassoc-12345678
    ```
    
* **Release an Elastic IP Address**
    
    ```bash
    aws ec2 release-address --allocation-id eipalloc-12345678
    ```
    

#### AMIs (Amazon Machine Images)

* **Create an AMI from an Instance**
    
    ```bash
    aws ec2 create-image --instance-id i-1234567890abcdef0 --name "My server" --no-reboot
    ```
    
* **List AMIs**
    
    ```bash
    aws ec2 describe-images --owners self
    ```
    
* **Deregister an AMI**
    
    ```bash
    aws ec2 deregister-image --image-id ami-0abcdef1234567890
    ```
    

#### Volumes

* **Create a New Volume**
    
    ```bash
    aws ec2 create-volume --size 10 --region us-west-2 --availability-zone us-west-2a --volume-type gp2
    ```
    
* **Attach a Volume to an Instance**
    
    ```bash
    aws ec2 attach-volume --volume-id vol-12345678 --instance-id i-1234567890abcdef0 --device /dev/sdf
    ```
    
* **Detach a Volume from an Instance**
    
    ```bash
    aws ec2 detach-volume --volume-id vol-12345678
    ```
    
* **Delete a Volume**
    
    ```bash
    aws ec2 delete-volume --volume-id vol-12345678
    ```
    

#### Snapshots

* **Create a Snapshot of a Volume**
    
    ```bash
    aws ec2 create-snapshot --volume-id vol-12345678 --description "My snapshot"
    ```
    
* **List Snapshots**
    
    ```bash
    aws ec2 describe-snapshots --owner-ids self
    ```
    
* **Delete a Snapshot**
    
    ```bash
    aws ec2 delete-snapshot --snapshot-id snap-12345678
    ```
    

#### VPC (Virtual Private Cloud)

* **Create a VPC**
    
    ```bash
    aws ec2 create-vpc --cidr-block 10.0.0.0/16
    ```
    
* **List VPCs**
    
    ```bash
    aws ec2 describe-vpcs
    ```
    
* **Delete a VPC**
    
    ```bash
    aws ec2 delete-vpc --vpc-id vpc-12345678
    ```
    

### Useful Options

* **Specify a Region**
    
    ```bash
    aws ec2 describe-instances --region us-west-2
    ```
    

This cheat sheet provides a quick reference to the most commonly used AWS EC2 commands. For more detailed information and additional commands, refer to the [official AWS CLI documentation](https://docs.aws.amazon.com/cli/latest/reference/ec2/index.html).