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+nilfs2 Simple Snapshot Scheduler
+================================
+
+The script +sss.sh+ is a "cron bot" script that manages nilfs2
+snapshots to make a rollback history that contains:
+
+ * the last of each year when older than a year, else
+ * the last of each month when older than a month, else
+ * the last of each week when older than a week, else
+ * the last of each day when older than a day, else
+ * the last of each hour when older than an hour, else
+ * a new snapshot every hour
+