Tutorials: compute-batch-6 (5 tutorials)

tuts/197-ec2-describe-instances/README.md

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+# Ec2 Describe Instances
+
+A read-only script that queries Ec2 resources and displays information.
+
+## Running
+
+```bash
+bash ec2-describe-instances.sh
+```
+
+## What it does
+
+1. Listing all instances"; aws ec2 describe-instances --query 'Reservations[].Instances[].{Id:InstanceId,Type:InstanceType,State:State.Name,Name:Tags[?Key==`Name`].Value|[0]}' --output table 2>/dev/null || echo "  No instances
+2. Counting by state
+
+## Resources created
+
+None — this script is read-only.
+
+## Cost
+
+No cost. This script only reads existing resources.
+
+## Related docs
+
+- [AWS CLI ec2 reference](https://docs.aws.amazon.com/cli/latest/reference/ec2/index.html)
+

tuts/197-ec2-describe-instances/REVISION-HISTORY.md

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+# Revision History: 197-ec2-describe-instances
+
+## Shell (CLI script)
+
+### 2026-04-14 v1 published
+- Type: functional
+- Initial version
+

tuts/197-ec2-describe-instances/ec2-describe-instances.md

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+# Ec2 Describe Instances
+
+## Prerequisites
+
+1. AWS CLI installed and configured (`aws configure`)
+2. Appropriate IAM permissions for the AWS services used
+
+## Step 1: Listing all instances"; aws ec2 describe-instances --query 'Reservations[].Instances[].{Id:InstanceId,Type:InstanceType,State:State.Name,Name:Tags[?Key==`Name`].Value|[0]}' --output table 2>/dev/null || echo "  No instances
+
+The script handles this step automatically. See `ec2-describe-instances.sh` for the exact CLI commands.
+
+## Step 2: Counting by state
+
+The script handles this step automatically. See `ec2-describe-instances.sh` for the exact CLI commands.
+

tuts/197-ec2-describe-instances/ec2-describe-instances.sh

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+#!/bin/bash
+WORK_DIR=$(mktemp -d); exec > >(tee -a "$WORK_DIR/tut.log") 2>&1
+REGION=${AWS_DEFAULT_REGION:-${AWS_REGION:-$(aws configure get region 2>/dev/null))}; [ -z "$REGION" ] && echo "ERROR: No region" && exit 1; export AWS_DEFAULT_REGION="$REGION"; echo "Region: $REGION"
+echo "Step 1: Listing all instances"; aws ec2 describe-instances --query 'Reservations[].Instances[].{Id:InstanceId,Type:InstanceType,State:State.Name,Name:Tags[?Key==`Name`].Value|[0]}' --output table 2>/dev/null || echo "  No instances"
+echo "Step 2: Counting by state"; aws ec2 describe-instances --query 'Reservations[].Instances[].State.Name' --output text | tr '\t' '\n' | sort | uniq -c
+echo ""; echo "Tutorial complete. Read-only."; rm -rf "$WORK_DIR"

tuts/200-ec2-vpc-subnets/README.md

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+# Ec2 Vpc Subnets
+
+A read-only script that queries Ec2 resources and displays information.
+
+## Running
+
+```bash
+bash ec2-vpc-subnets.sh
+```
+
+## What it does
+
+1. Listing VPCs
+2. Listing subnets
+3. Listing route tables
+4. Listing internet gateways
+
+## Resources created
+
+None — this script is read-only.
+
+## Cost
+
+No cost. This script only reads existing resources.
+
+## Related docs
+
+- [AWS CLI ec2 reference](https://docs.aws.amazon.com/cli/latest/reference/ec2/index.html)
+

tuts/200-ec2-vpc-subnets/REVISION-HISTORY.md

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+# Revision History: 200-ec2-vpc-subnets
+
+## Shell (CLI script)
+
+### 2026-04-14 v1 published
+- Type: functional
+- Initial version
+

tuts/200-ec2-vpc-subnets/ec2-vpc-subnets.md

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+# Ec2 Vpc Subnets
+
+## Prerequisites
+
+1. AWS CLI installed and configured (`aws configure`)
+2. Appropriate IAM permissions for the AWS services used
+
+## Step 1: Listing VPCs
+
+The script handles this step automatically. See `ec2-vpc-subnets.sh` for the exact CLI commands.
+
+## Step 2: Listing subnets
+
+The script handles this step automatically. See `ec2-vpc-subnets.sh` for the exact CLI commands.
+
+## Step 3: Listing route tables
+
+The script handles this step automatically. See `ec2-vpc-subnets.sh` for the exact CLI commands.
+
+## Step 4: Listing internet gateways
+
+The script handles this step automatically. See `ec2-vpc-subnets.sh` for the exact CLI commands.
+

tuts/200-ec2-vpc-subnets/ec2-vpc-subnets.sh

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+#!/bin/bash
+WORK_DIR=$(mktemp -d); exec > >(tee -a "$WORK_DIR/tut.log") 2>&1
+REGION=${AWS_DEFAULT_REGION:-${AWS_REGION:-$(aws configure get region 2>/dev/null))}; [ -z "$REGION" ] && echo "ERROR: No region" && exit 1; export AWS_DEFAULT_REGION="$REGION"; echo "Region: $REGION"
+echo "Step 1: Listing VPCs"; aws ec2 describe-vpcs --query 'Vpcs[].{Id:VpcId,CIDR:CidrBlock,Default:IsDefault}' --output table
+echo "Step 2: Listing subnets"; aws ec2 describe-subnets --query 'Subnets[:10].{Id:SubnetId,VPC:VpcId,AZ:AvailabilityZone,CIDR:CidrBlock}' --output table
+echo "Step 3: Listing route tables"; aws ec2 describe-route-tables --query 'RouteTables[:5].{Id:RouteTableId,VPC:VpcId,Routes:Routes|length(@)}' --output table
+echo "Step 4: Listing internet gateways"; aws ec2 describe-internet-gateways --query 'InternetGateways[:5].{Id:InternetGatewayId,VPC:Attachments[0].VpcId}' --output table
+echo ""; echo "Tutorial complete. Read-only."; rm -rf "$WORK_DIR"

tuts/201-lambda-logging/README.md

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+# Lambda Logging
+
+A read-only script that queries Logs resources and displays information.
+
+## Running
+
+```bash
+bash lambda-logging.sh
+```
+
+## What it does
+
+1. Listing Lambda log groups
+2. Getting recent log events from a function
+
+## Resources created
+
+None — this script is read-only.
+
+## Cost
+
+No cost. This script only reads existing resources.
+
+## Related docs
+
+- [AWS CLI logs reference](https://docs.aws.amazon.com/cli/latest/reference/logs/index.html)
+

tuts/201-lambda-logging/REVISION-HISTORY.md

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+# Revision History: 201-lambda-logging
+
+## Shell (CLI script)
+
+### 2026-04-14 v1 published
+- Type: functional
+- Initial version
+

tuts/201-lambda-logging/lambda-logging.md

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+# Lambda Logging
+
+## Prerequisites
+
+1. AWS CLI installed and configured (`aws configure`)
+2. Appropriate IAM permissions for the AWS services used
+
+## Step 1: Listing Lambda log groups
+
+The script handles this step automatically. See `lambda-logging.sh` for the exact CLI commands.
+
+## Step 2: Getting recent log events from a function
+
+The script handles this step automatically. See `lambda-logging.sh` for the exact CLI commands.
+

tuts/201-lambda-logging/lambda-logging.sh

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+#!/bin/bash
+WORK_DIR=$(mktemp -d); exec > >(tee -a "$WORK_DIR/tut.log") 2>&1
+REGION=${AWS_DEFAULT_REGION:-${AWS_REGION:-$(aws configure get region 2>/dev/null))}; [ -z "$REGION" ] && echo "ERROR: No region" && exit 1; export AWS_DEFAULT_REGION="$REGION"; echo "Region: $REGION"
+echo "Step 1: Listing Lambda log groups"; aws logs describe-log-groups --log-group-name-prefix /aws/lambda --query 'logGroups[:10].{Name:logGroupName,Stored:storedBytes,Retention:retentionInDays}' --output table
+echo "Step 2: Getting recent log events from a function"
+LG=$(aws logs describe-log-groups --log-group-name-prefix /aws/lambda --query 'logGroups[0].logGroupName' --output text 2>/dev/null)
+[ -n "$LG" ] && [ "$LG" != "None" ] && { LS=$(aws logs describe-log-streams --log-group-name "$LG" --order-by LastEventTime --descending --limit 1 --query 'logStreams[0].logStreamName' --output text); aws logs get-log-events --log-group-name "$LG" --log-stream-name "$LS" --limit 5 --query 'events[].message' --output text; } || echo "  No Lambda log groups"
+echo ""; echo "Tutorial complete. Read-only."; rm -rf "$WORK_DIR"

tuts/204-ec2-network-interfaces/README.md

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+# Ec2 Network Interfaces
+
+A read-only script that queries Ec2 resources and displays information.
+
+## Running
+
+```bash
+bash ec2-network-interfaces.sh
+```
+
+## What it does
+
+1. Listing network interfaces
+2. Counting by type
+
+## Resources created
+
+None — this script is read-only.
+
+## Cost
+
+No cost. This script only reads existing resources.
+
+## Related docs
+
+- [AWS CLI ec2 reference](https://docs.aws.amazon.com/cli/latest/reference/ec2/index.html)
+

tuts/204-ec2-network-interfaces/REVISION-HISTORY.md

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+# Revision History: 204-ec2-network-interfaces
+
+## Shell (CLI script)
+
+### 2026-04-14 v1 published
+- Type: functional
+- Initial version
+

tuts/204-ec2-network-interfaces/ec2-network-interfaces.md

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+# Ec2 Network Interfaces
+
+## Prerequisites
+
+1. AWS CLI installed and configured (`aws configure`)
+2. Appropriate IAM permissions for the AWS services used
+
+## Step 1: Listing network interfaces
+
+The script handles this step automatically. See `ec2-network-interfaces.sh` for the exact CLI commands.
+
+## Step 2: Counting by type
+
+The script handles this step automatically. See `ec2-network-interfaces.sh` for the exact CLI commands.
+

tuts/204-ec2-network-interfaces/ec2-network-interfaces.sh

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+#!/bin/bash
+WORK_DIR=$(mktemp -d); exec > >(tee -a "$WORK_DIR/tut.log") 2>&1
+REGION=${AWS_DEFAULT_REGION:-${AWS_REGION:-$(aws configure get region 2>/dev/null))}; [ -z "$REGION" ] && echo "ERROR: No region" && exit 1; export AWS_DEFAULT_REGION="$REGION"; echo "Region: $REGION"
+echo "Step 1: Listing network interfaces"; aws ec2 describe-network-interfaces --query 'NetworkInterfaces[:10].{Id:NetworkInterfaceId,Type:InterfaceType,Status:Status,SubnetId:SubnetId}' --output table
+echo "Step 2: Counting by type"; aws ec2 describe-network-interfaces --query 'NetworkInterfaces[].InterfaceType' --output text | tr '\t' '\n' | sort | uniq -c | sort -rn
+echo ""; echo "Tutorial complete. Read-only."; rm -rf "$WORK_DIR"

tuts/207-ec2-volumes/README.md

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+# Ec2 Volumes
+
+A read-only script that queries Ec2 resources and displays information.
+
+## Running
+
+```bash
+bash ec2-volumes.sh
+```
+
+## What it does
+
+1. Listing volumes
+2. Volume summary"; echo "  Total: $(aws ec2 describe-volumes --query 'Volumes | length(@)' --output text) volumes
+
+## Resources created
+
+None — this script is read-only.
+
+## Cost
+
+No cost. This script only reads existing resources.
+
+## Related docs
+
+- [AWS CLI ec2 reference](https://docs.aws.amazon.com/cli/latest/reference/ec2/index.html)
+

tuts/207-ec2-volumes/REVISION-HISTORY.md

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+# Revision History: 207-ec2-volumes
+
+## Shell (CLI script)
+
+### 2026-04-14 v1 published
+- Type: functional
+- Initial version
+

tuts/207-ec2-volumes/ec2-volumes.md

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+# Ec2 Volumes
+
+## Prerequisites
+
+1. AWS CLI installed and configured (`aws configure`)
+2. Appropriate IAM permissions for the AWS services used
+
+## Step 1: Listing volumes
+
+The script handles this step automatically. See `ec2-volumes.sh` for the exact CLI commands.
+
+## Step 2: Volume summary"; echo "  Total: $(aws ec2 describe-volumes --query 'Volumes | length(@)' --output text) volumes
+
+The script handles this step automatically. See `ec2-volumes.sh` for the exact CLI commands.
+

tuts/207-ec2-volumes/ec2-volumes.sh

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+#!/bin/bash
+WORK_DIR=$(mktemp -d); exec > >(tee -a "$WORK_DIR/tut.log") 2>&1
+REGION=${AWS_DEFAULT_REGION:-${AWS_REGION:-$(aws configure get region 2>/dev/null))}; [ -z "$REGION" ] && echo "ERROR: No region" && exit 1; export AWS_DEFAULT_REGION="$REGION"; echo "Region: $REGION"
+echo "Step 1: Listing volumes"; aws ec2 describe-volumes --query 'Volumes[:10].{Id:VolumeId,Type:VolumeType,Size:Size,State:State,AZ:AvailabilityZone}' --output table
+echo "Step 2: Volume summary"; echo "  Total: $(aws ec2 describe-volumes --query 'Volumes | length(@)' --output text) volumes"
+echo ""; echo "Tutorial complete. Read-only."; rm -rf "$WORK_DIR"