rsync is a file transfer program capable of efficient remote update via a fast differencing algorithm.
关于笔者常用到的一些选项如下：
Options -v, --verbose increase verbosity --info=FLAGS fine-grained informational verbosity --debug=FLAGS fine-grained debug verbosity --msgs2stderr special output handling for debugging -a, --archive archive mode; equals -rlptgoD (no -H,-A,-X) --no-OPTION turn off an implied OPTION (e.g. --no-D) -r, --recursive recurse into directories -l, --links copy symlinks as symlinks -p, --perms preserve permissions -o, --owner preserve owner (super-user only) -g, --group preserve group -D same as --devices --specials -t, --times preserve modification times -z, --compress compress file data during the transfer --compress-level=NUM explicitly set compression level --skip-compress=LIST skip compressing files with a suffix in LIST
关于使用rsync进行文件传输的场景举例：
1、将本机的 /rhel/patch/ 目录下的全部同步上传到 远程主机的 /dc-patch/ 目录
[root@qq-5201351 ~]# rsync -az /rhel/patch/ 192.168.88.89:/dc-patch/
执行后，需要输入远程主机的密码，没有指定用户名，即代表的当前的用户名，这里为root用户
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