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

Author: mwunderl

tuts/117-elastic-load-balancing-gs/REVISION-HISTORY.md

@@ -0,0 +1,8 @@
+# Revision History: 117-elastic-load-balancing-gs
+
+## Shell (CLI script)
+
+### 2026-04-14 v1 published
+- Type: functional
+- Initial version
+

tuts/117-elastic-load-balancing-gs/elastic-load-balancing-gs.sh

@@ -14,7 +14,7 @@ fi
 export AWS_DEFAULT_REGION="$REGION"
 echo "Region: $REGION"
 
-RANDOM_ID=$(openssl rand -hex 4)
+RANDOM_ID=$(cat /dev/urandom | tr -dc 'a-z0-9' | fold -w 8 | head -n 1)
 ALB_NAME="tut-alb-${RANDOM_ID}"
 TG_NAME="tut-tg-${RANDOM_ID}"
 

tuts/143-aws-transfer-gs/REVISION-HISTORY.md

@@ -0,0 +1,8 @@
+# Revision History: 143-aws-transfer-gs
+
+## Shell (CLI script)
+
+### 2026-04-14 v1 published
+- Type: functional
+- Initial version
+

tuts/143-aws-transfer-gs/aws-transfer-gs.sh

@@ -1,7 +1,7 @@
 #!/bin/bash
 WORK_DIR=$(mktemp -d); exec > >(tee -a "$WORK_DIR/transfer.log") 2>&1
-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: $REGION"
-RANDOM_ID=$(openssl rand -hex 4)
+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: $REGION"
+RANDOM_ID=$(cat /dev/urandom | tr -dc 'a-z0-9' | fold -w 8 | head -n 1)
 handle_error() { echo "ERROR on line $1"; trap - ERR; cleanup; exit 1; }; trap 'handle_error $LINENO' ERR
 cleanup() { echo ""; echo "Cleaning up..."; [ -n "$SERVER_ID" ] && aws transfer delete-server --server-id "$SERVER_ID" 2>/dev/null && echo "  Deleted server (takes ~1 min)"; rm -rf "$WORK_DIR"; echo "Done."; }
 echo "Step 1: Creating SFTP server"

tuts/144-aws-datasync-gs/REVISION-HISTORY.md

@@ -0,0 +1,8 @@
+# Revision History: 144-aws-datasync-gs
+
+## Shell (CLI script)
+
+### 2026-04-14 v1 published
+- Type: functional
+- Initial version
+

tuts/144-aws-datasync-gs/aws-datasync-gs.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 WORK_DIR=$(mktemp -d); exec > >(tee -a "$WORK_DIR/datasync.log") 2>&1
-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: $REGION"
+REGION=${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 agents"
 aws datasync list-agents --query 'Agents[:5].{Arn:AgentArn,Name:Name,Status:Status}' --output table 2>/dev/null || echo "  No agents configured"
 echo "Step 2: Listing locations"

tuts/145-aws-globalaccelerator-gs/REVISION-HISTORY.md

@@ -0,0 +1,8 @@
+# Revision History: 145-aws-globalaccelerator-gs
+
+## Shell (CLI script)
+
+### 2026-04-14 v1 published
+- Type: functional
+- Initial version
+

tuts/145-aws-globalaccelerator-gs/aws-globalaccelerator-gs.sh

@@ -1,7 +1,7 @@
 #!/bin/bash
 WORK_DIR=$(mktemp -d); exec > >(tee -a "$WORK_DIR/ga.log") 2>&1
 export AWS_DEFAULT_REGION=us-west-2; echo "Region: us-west-2 (Global Accelerator)"
-RANDOM_ID=$(openssl rand -hex 4); GA_NAME="tut-ga-${RANDOM_ID}"
+RANDOM_ID=$(cat /dev/urandom | tr -dc 'a-z0-9' | fold -w 8 | head -n 1); GA_NAME="tut-ga-${RANDOM_ID}"
 handle_error() { echo "ERROR on line $1"; trap - ERR; cleanup; exit 1; }; trap 'handle_error $LINENO' ERR
 cleanup() { echo ""; echo "Cleaning up..."; [ -n "$GA_ARN" ] && { aws globalaccelerator update-accelerator --accelerator-arn "$GA_ARN" --no-enabled 2>/dev/null; sleep 5; aws globalaccelerator delete-accelerator --accelerator-arn "$GA_ARN" 2>/dev/null && echo "  Deleted accelerator"; }; rm -rf "$WORK_DIR"; echo "Done."; }
 echo "Step 1: Creating accelerator: $GA_NAME"

tuts/158-vpc-endpoints/REVISION-HISTORY.md

@@ -0,0 +1,8 @@
+# Revision History: 158-vpc-endpoints
+
+## Shell (CLI script)
+
+### 2026-04-14 v1 published
+- Type: functional
+- Initial version
+

tuts/158-vpc-endpoints/vpc-endpoints.sh

@@ -1,7 +1,7 @@
 #!/bin/bash
 WORK_DIR=$(mktemp -d); exec > >(tee -a "$WORK_DIR/vpc-ep.log") 2>&1
-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: $REGION"
-RANDOM_ID=$(openssl rand -hex 4)
+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: $REGION"
+RANDOM_ID=$(cat /dev/urandom | tr -dc 'a-z0-9' | fold -w 8 | head -n 1)
 VPC_ID=$(aws ec2 describe-vpcs --filters "Name=isDefault,Values=true" --query 'Vpcs[0].VpcId' --output text)
 handle_error() { echo "ERROR on line $1"; trap - ERR; cleanup; exit 1; }; trap 'handle_error $LINENO' ERR
 cleanup() { echo ""; echo "Cleaning up..."; [ -n "$EP_ID" ] && aws ec2 delete-vpc-endpoints --vpc-endpoint-ids "$EP_ID" > /dev/null 2>&1 && echo "  Deleted endpoint"; rm -rf "$WORK_DIR"; echo "Done."; }