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Apply technical requirements (R1, R2, R9, R10, R13)
- R1: Add AWS_REGION to region fallback chain - R2: Replace openssl rand with /dev/urandom - R9: Remove Appendix/Generation details from READMEs - R10: Remove internal references - R13: Add REVISION-HISTORY.md
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‎tuts/160-ec2-security-groups/REVISION-HISTORY.md‎

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# Revision History: 160-ec2-security-groups
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## Shell (CLI script)
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### 2026-04-14 v1 published
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- Type: functional
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- Initial version
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‎tuts/160-ec2-security-groups/ec2-security-groups.sh‎

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#!/bin/bash
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WORK_DIR=$(mktemp -d); exec > >(tee -a "$WORK_DIR/sg.log") 2>&1
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REGION=${AWS_DEFAULT_REGION:-$(aws configure get region 2>/dev/null)}; [ -z "$REGION" ] && echo "ERROR: No region" && exit 1; export AWS_DEFAULT_REGION="$REGION"; echo "Region: $REGION"
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RANDOM_ID=$(openssl rand -hex 4); SG_NAME="tut-sg-${RANDOM_ID}"
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REGION=${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: $REGION"
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RANDOM_ID=$(cat /dev/urandom | tr -dc 'a-z0-9' | fold -w 8 | head -n 1); SG_NAME="tut-sg-${RANDOM_ID}"
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VPC_ID=$(aws ec2 describe-vpcs --filters "Name=isDefault,Values=true" --query 'Vpcs[0].VpcId' --output text)
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handle_error() { echo "ERROR on line $1"; trap - ERR; cleanup; exit 1; }; trap 'handle_error $LINENO' ERR
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cleanup() { echo ""; echo "Cleaning up..."; [ -n "$SG_ID" ] && aws ec2 delete-security-group --group-id "$SG_ID" 2>/dev/null && echo " Deleted security group"; rm -rf "$WORK_DIR"; echo "Done."; }

‎tuts/161-lambda-environment-variables/REVISION-HISTORY.md‎

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# Revision History: 161-lambda-environment-variables
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## Shell (CLI script)
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### 2026-04-14 v1 published
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- Type: functional
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- Initial version
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‎tuts/161-lambda-environment-variables/lambda-env-vars.sh‎

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#!/bin/bash
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WORK_DIR=$(mktemp -d); exec > >(tee -a "$WORK_DIR/lambda-env.log") 2>&1
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REGION=${AWS_DEFAULT_REGION:-$(aws configure get region 2>/dev/null)}; [ -z "$REGION" ] && echo "ERROR: No region" && exit 1; export AWS_DEFAULT_REGION="$REGION"; echo "Region: $REGION"
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RANDOM_ID=$(openssl rand -hex 4); FUNC="tut-env-${RANDOM_ID}"; ROLE="lambda-env-role-${RANDOM_ID}"
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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: $REGION"
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RANDOM_ID=$(cat /dev/urandom | tr -dc 'a-z0-9' | fold -w 8 | head -n 1); FUNC="tut-env-${RANDOM_ID}"; ROLE="lambda-env-role-${RANDOM_ID}"
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handle_error() { echo "ERROR on line $1"; trap - ERR; cleanup; exit 1; }; trap 'handle_error $LINENO' ERR
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cleanup() { echo ""; echo "Cleaning up..."; aws lambda delete-function --function-name "$FUNC" 2>/dev/null && echo " Deleted function"; aws iam detach-role-policy --role-name "$ROLE" --policy-arn arn:aws:iam::aws:policy/service-role/AWSLambdaBasicExecutionRole 2>/dev/null; aws iam delete-role --role-name "$ROLE" 2>/dev/null && echo " Deleted role"; rm -rf "$WORK_DIR"; echo "Done."; }
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ROLE_ARN=$(aws iam create-role --role-name "$ROLE" --assume-role-policy-document '{"Version":"2012-10-17","Statement":[{"Effect":"Allow","Principal":{"Service":"lambda.amazonaws.com"},"Action":"sts:AssumeRole"}]}' --query 'Role.Arn' --output text)

‎tuts/166-lambda-aliases/REVISION-HISTORY.md‎

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# Revision History: 166-lambda-aliases
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## Shell (CLI script)
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### 2026-04-14 v1 published
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- Type: functional
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- Initial version
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‎tuts/166-lambda-aliases/lambda-aliases.sh‎

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#!/bin/bash
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WORK_DIR=$(mktemp -d); exec > >(tee -a "$WORK_DIR/alias.log") 2>&1
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REGION=${AWS_DEFAULT_REGION:-$(aws configure get region 2>/dev/null)}; [ -z "$REGION" ] && echo "ERROR: No region" && exit 1; export AWS_DEFAULT_REGION="$REGION"; echo "Region: $REGION"
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RANDOM_ID=$(openssl rand -hex 4); FUNC="tut-alias-${RANDOM_ID}"; ROLE="lambda-alias-role-${RANDOM_ID}"
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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: $REGION"
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RANDOM_ID=$(cat /dev/urandom | tr -dc 'a-z0-9' | fold -w 8 | head -n 1); FUNC="tut-alias-${RANDOM_ID}"; ROLE="lambda-alias-role-${RANDOM_ID}"
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handle_error() { echo "ERROR on line $1"; trap - ERR; cleanup; exit 1; }; trap 'handle_error $LINENO' ERR
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cleanup() { echo ""; echo "Cleaning up..."; aws lambda delete-alias --function-name "$FUNC" --name live 2>/dev/null; aws lambda delete-function --function-name "$FUNC" 2>/dev/null && echo " Deleted function"; aws iam detach-role-policy --role-name "$ROLE" --policy-arn arn:aws:iam::aws:policy/service-role/AWSLambdaBasicExecutionRole 2>/dev/null; aws iam delete-role --role-name "$ROLE" 2>/dev/null && echo " Deleted role"; rm -rf "$WORK_DIR"; echo "Done."; }
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ROLE_ARN=$(aws iam create-role --role-name "$ROLE" --assume-role-policy-document '{"Version":"2012-10-17","Statement":[{"Effect":"Allow","Principal":{"Service":"lambda.amazonaws.com"},"Action":"sts:AssumeRole"}]}' --query 'Role.Arn' --output text)

‎tuts/169-ec2-key-pairs/REVISION-HISTORY.md‎

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# Revision History: 169-ec2-key-pairs
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## Shell (CLI script)
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### 2026-04-14 v1 published
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- Type: functional
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- Initial version
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‎tuts/169-ec2-key-pairs/ec2-keypairs.sh‎

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#!/bin/bash
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WORK_DIR=$(mktemp -d); exec > >(tee -a "$WORK_DIR/kp.log") 2>&1
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REGION=${AWS_DEFAULT_REGION:-$(aws configure get region 2>/dev/null)}; [ -z "$REGION" ] && echo "ERROR: No region" && exit 1; export AWS_DEFAULT_REGION="$REGION"; echo "Region: $REGION"
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RANDOM_ID=$(openssl rand -hex 4); KEY1="tut-key-${RANDOM_ID}-rsa"; KEY2="tut-key-${RANDOM_ID}-ed25519"
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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: $REGION"
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RANDOM_ID=$(cat /dev/urandom | tr -dc 'a-z0-9' | fold -w 8 | head -n 1); KEY1="tut-key-${RANDOM_ID}-rsa"; KEY2="tut-key-${RANDOM_ID}-ed25519"
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handle_error() { echo "ERROR on line $1"; trap - ERR; cleanup; exit 1; }; trap 'handle_error $LINENO' ERR
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cleanup() { echo ""; echo "Cleaning up..."; aws ec2 delete-key-pair --key-name "$KEY1" 2>/dev/null && echo " Deleted $KEY1"; aws ec2 delete-key-pair --key-name "$KEY2" 2>/dev/null && echo " Deleted $KEY2"; rm -rf "$WORK_DIR"; echo "Done."; }
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echo "Step 1: Creating RSA key pair"

‎tuts/170-lambda-function-urls/REVISION-HISTORY.md‎

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# Revision History: 170-lambda-function-urls
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## Shell (CLI script)
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### 2026-04-14 v1 published
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- Type: functional
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- Initial version
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‎tuts/170-lambda-function-urls/lambda-urls.sh‎

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#!/bin/bash
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WORK_DIR=$(mktemp -d); exec > >(tee -a "$WORK_DIR/url.log") 2>&1
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REGION=${AWS_DEFAULT_REGION:-$(aws configure get region 2>/dev/null)}; [ -z "$REGION" ] && echo "ERROR: No region" && exit 1; export AWS_DEFAULT_REGION="$REGION"; echo "Region: $REGION"
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RANDOM_ID=$(openssl rand -hex 4); FUNC="tut-url-${RANDOM_ID}"; ROLE="lambda-url-role-${RANDOM_ID}"
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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: $REGION"
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RANDOM_ID=$(cat /dev/urandom | tr -dc 'a-z0-9' | fold -w 8 | head -n 1); FUNC="tut-url-${RANDOM_ID}"; ROLE="lambda-url-role-${RANDOM_ID}"
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handle_error() { echo "ERROR on line $1"; trap - ERR; cleanup; exit 1; }; trap 'handle_error $LINENO' ERR
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cleanup() { echo ""; echo "Cleaning up..."; aws lambda delete-function-url-config --function-name "$FUNC" 2>/dev/null; aws lambda delete-function --function-name "$FUNC" 2>/dev/null && echo " Deleted function"; aws iam detach-role-policy --role-name "$ROLE" --policy-arn arn:aws:iam::aws:policy/service-role/AWSLambdaBasicExecutionRole 2>/dev/null; aws iam delete-role --role-name "$ROLE" 2>/dev/null && echo " Deleted role"; rm -rf "$WORK_DIR"; echo "Done."; }
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ROLE_ARN=$(aws iam create-role --role-name "$ROLE" --assume-role-policy-document '{"Version":"2012-10-17","Statement":[{"Effect":"Allow","Principal":{"Service":"lambda.amazonaws.com"},"Action":"sts:AssumeRole"}]}' --query 'Role.Arn' --output text)

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