所以我想将一堆文件从我的 mac 同步到外部驱动器并尝试了这个：
$ rsync -vv --files-from=backup.txt /Volumes/Seagate\ Expansion\ Drive/2022-12-27-imac-backup/
rsync version 2.6.9 protocol version 29
Copyright (C) 1996-2006 by Andrew Tridgell, Wayne Davison, and others.
<http://rsync.samba.org/>
Capabilities: 64-bit files, socketpairs, hard links, symlinks, batchfiles,
inplace, IPv6, 64-bit system inums, 64-bit internal inums
rsync comes with ABSOLUTELY NO WARRANTY. This is free software, and you
are welcome to redistribute it under certain conditions. See the GNU
General Public Licence for details.
rsync is a file transfer program capable of efficient remote update
via a fast differencing algorithm.
Usage: rsync [OPTION]... SRC [SRC]... DEST
or rsync [OPTION]... SRC [SRC]... [USER@]HOST:DEST
or rsync [OPTION]... SRC [SRC]... [USER@]HOST::DEST
or rsync [OPTION]... SRC [SRC]... rsync://[USER@]HOST[:PORT]/DEST
or rsync [OPTION]... [USER@]HOST:SRC [DEST]
or rsync [OPTION]... [USER@]HOST::SRC [DEST]
or rsync [OPTION]... rsync://[USER@]HOST[:PORT]/SRC [DEST]
The ':' usages connect via remote shell, while '::' & 'rsync://' usages connect
to an rsync daemon, and require SRC or DEST to start with a module name.
Options
-v, --verbose increase verbosity
-q, --quiet suppress non-error messages
....
....
(snip)
....
Use "rsync --daemon --help" to see the daemon-mode command-line options.
Please see the rsync(1) and rsyncd.conf(5) man pages for full documentation.
See http://rsync.samba.org/ for updates, bug reports, and answers
rsync error: syntax or usage error (code 1) at /AppleInternal/Library/BuildRoots/aaefcfd1-5c95-11ed-8734-2e32217d8374/Library/Caches/com.apple.xbs/Sources/rsync/rsync/options.c(1436) [client=2.6.9]
所以它并没有说什么错了，但有些事情确实发生了。我猜是文件格式不对？但这并不那么奇特：
$ cat backup.txt
/Users/carlerik/Downloads/Paragon-31091-PEU_MacInstallUnlock-15.10.485.dmg
/Users/carlerik/Documents/Øvelser.ptflow
/Users/carlerik/Pictures/syncdir/2019
/Users/carlerik/Pictures/dump
/Users/carlerik/Pictures/dronebilder*
/Users/carlerik/Pictures/profilbilde
/Users/carlerik/sohf_next-2022_10_18_11_09_03-dump.sql
/Users/carlerik/develop_k8s-2022_10_25_10_56_35-dump.sql
搜索示例并不是很有成果，因为没有人列出from 文件的内容。
$ rsync --version
rsync version 2.6.9 protocol version 29
