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joplin notion extension/linux/Snippets/deleting every 10th file.md

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+deleting every 10th file
+
+```sh
+
+#!/usr/bin/env bash
+set -euo pipefail
+
+# Directory containing save files (defaults to current directory)
+DIR="${1:-.}"
+
+# Set to 1 to actually delete files; otherwise, preview only
+DELETE=0
+
+mapfile -t files < <(
+    find "$DIR" -maxdepth 1 -type f \
+        -name 'ManualSave_*.sav' \
+        -printf '%T@ %p\n' |
+    sort -n |
+    cut -d' ' -f2-
+)
+
+total=${#files[@]}
+
+echo "Found $total save files."
+echo "Keeping every 10th file, ordered oldest to newest."
+echo
+
+for ((i = 0; i < total; i++)); do
+    if (( (i + 1) % 10 == 0 )); then
+        echo "KEEP   ${files[i]}"
+    else
+        if (( DELETE )); then
+            rm -- "${files[i]}"
+            echo "DELETE ${files[i]}"
+        else
+            echo "WOULD DELETE ${files[i]}"
+        fi
+    fi
+done
+
+echo
+if (( DELETE )); then
+    echo "Done."
+else
+    echo "Dry run only. No files were deleted."
+    echo "To enable deletion, change DELETE=0 to DELETE=1."
+fi
+
+```