Copy — File & Data Copy Operations Reference

Quick-reference skill for file copy strategies, rsync patterns, copy-on-write, and cross-platform synchronization.

When to Use

• Duplicating files or directory trees with specific filters
• Setting up rsync-based backups or mirrors
• Understanding copy-on-write (CoW) behavior
• Implementing efficient copy strategies for large datasets
• Troubleshooting copy failures and permission issues

Commands

intro

scripts/script.sh intro

Overview of copy operations — types, semantics, and platform differences.

rsync

scripts/script.sh rsync

Rsync patterns — common flags, partial transfers, and include/exclude rules.

cow

scripts/script.sh cow

Copy-on-Write (CoW) — reflinks, filesystem support, and when to use.

patterns

scripts/script.sh patterns

Common copy patterns — mirroring, incremental, differential, snapshot.

filters

scripts/script.sh filters

File filtering techniques — by extension, date, size, and gitignore integration.

performance

scripts/script.sh performance

Performance optimization — buffer sizes, parallel copy, and I/O tuning.

errors

scripts/script.sh errors

Common copy errors, permissions issues, and troubleshooting guide.

checklist

scripts/script.sh checklist

Pre-copy and post-copy verification checklist.

help

scripts/script.sh help

version

scripts/script.sh version

Configuration

| Variable | Description | |----------|-------------| | COPY_DIR | Data directory (default: ~/.copy/) |

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