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/198-s3-cors/REVISION-HISTORY.md

@@ -0,0 +1,8 @@
+# Revision History: 198-s3-cors
+
+## Shell (CLI script)
+
+### 2026-04-14 v1 published
+- Type: functional
+- Initial version
+

tuts/198-s3-cors/s3-cors.sh

@@ -1,7 +1,7 @@
 #!/bin/bash
 WORK_DIR=$(mktemp -d); exec > >(tee -a "$WORK_DIR/tut.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); ACCOUNT=$(aws sts get-caller-identity --query Account --output text); B="cors-tut-${RANDOM_ID}-${ACCOUNT}"
+REGION=${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); ACCOUNT=$(aws sts get-caller-identity --query Account --output text); B="cors-tut-${RANDOM_ID}-${ACCOUNT}"
 cleanup() { aws s3 rb "s3://$B" 2>/dev/null; rm -rf "$WORK_DIR"; echo "Done."; }
 echo "Step 1: Creating bucket"; aws s3api create-bucket --bucket "$B" > /dev/null
 echo "Step 2: Setting CORS"; aws s3api put-bucket-cors --bucket "$B" --cors-configuration '{"CORSRules":[{"AllowedOrigins":["https://example.com"],"AllowedMethods":["GET","PUT"],"AllowedHeaders":["*"],"MaxAgeSeconds":3600}]}'

tuts/202-s3-storage-classes/REVISION-HISTORY.md

@@ -0,0 +1,8 @@
+# Revision History: 202-s3-storage-classes
+
+## Shell (CLI script)
+
+### 2026-04-14 v1 published
+- Type: functional
+- Initial version
+

tuts/202-s3-storage-classes/s3-storage-classes.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 WORK_DIR=$(mktemp -d); exec > >(tee -a "$WORK_DIR/tut.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: $REGION"
 echo "Step 1: Listing objects with storage classes"
 BUCKET=$(aws s3api list-buckets --query 'Buckets[0].Name' --output text)
 [ -n "$BUCKET" ] && [ "$BUCKET" != "None" ] && aws s3api list-objects-v2 --bucket "$BUCKET" --max-keys 10 --query 'Contents[].{Key:Key,Size:Size,Class:StorageClass}' --output table || echo "  No buckets"

tuts/206-s3-metrics/REVISION-HISTORY.md

@@ -0,0 +1,8 @@
+# Revision History: 206-s3-metrics
+
+## Shell (CLI script)
+
+### 2026-04-14 v1 published
+- Type: functional
+- Initial version
+

tuts/206-s3-metrics/s3-metrics.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 WORK_DIR=$(mktemp -d); exec > >(tee -a "$WORK_DIR/tut.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 buckets with sizes"
 aws s3api list-buckets --query 'Buckets[:10].{Name:Name,Created:CreationDate}' --output table
 echo "Step 2: Getting bucket metrics (request count)"

tuts/209-s3-list-buckets/REVISION-HISTORY.md

@@ -0,0 +1,8 @@
+# Revision History: 209-s3-list-buckets
+
+## Shell (CLI script)
+
+### 2026-04-14 v1 published
+- Type: functional
+- Initial version
+

tuts/209-s3-list-buckets/s3-list-buckets.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 WORK_DIR=$(mktemp -d); exec > >(tee -a "$WORK_DIR/tut.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 all buckets"; aws s3api list-buckets --query 'Buckets[].{Name:Name,Created:CreationDate}' --output table
 echo "Step 2: Bucket count"; echo "  Total: $(aws s3api list-buckets --query 'Buckets | length(@)' --output text) buckets"
 echo "Step 3: Checking public access block"; B=$(aws s3api list-buckets --query 'Buckets[0].Name' --output text); [ -n "$B" ] && [ "$B" != "None" ] && aws s3api get-public-access-block --bucket "$B" --query 'PublicAccessBlockConfiguration' --output table 2>/dev/null || echo "  No public access block"

tuts/214-s3-bucket-tagging/REVISION-HISTORY.md

@@ -0,0 +1,8 @@
+# Revision History: 214-s3-bucket-tagging
+
+## Shell (CLI script)
+
+### 2026-04-14 v1 published
+- Type: functional
+- Initial version
+

tuts/214-s3-bucket-tagging/s3-bucket-tagging.sh

@@ -1,7 +1,7 @@
 #!/bin/bash
 WORK_DIR=$(mktemp -d); exec > >(tee -a "$WORK_DIR/tut.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); ACCOUNT=$(aws sts get-caller-identity --query Account --output text); B="tag-tut-${RANDOM_ID}-${ACCOUNT}"
+REGION=${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); ACCOUNT=$(aws sts get-caller-identity --query Account --output text); B="tag-tut-${RANDOM_ID}-${ACCOUNT}"
 cleanup() { aws s3 rb "s3://$B" 2>/dev/null; rm -rf "$WORK_DIR"; echo "Done."; }
 echo "Step 1: Creating bucket"; aws s3api create-bucket --bucket "$B" > /dev/null
 echo "Step 2: Adding tags"; aws s3api put-bucket-tagging --bucket "$B" --tagging 'TagSet=[{Key=Environment,Value=tutorial},{Key=Project,Value=tagging-demo},{Key=Owner,Value=tutorial-user}]'