Linux centos7 rsync Tool Introduction, rsync common options, rsync synchronization via SSH

I. Introduction of RSYNC Tools

Rsync is a data-mirroring Backup tool under Unix-like systems, and--remote sync can be seen from the name of the software. Rsync is a file synchronization and data Transfer tool under the Linux system that uses the "rsync" algorithm to synchronize files between a client and a remote file server, or to back up data from one partition to another on the local system. If Rsync has a data transfer interruption during the backup process, it can continue to transmit the inconsistent portions after recovery. Rsync can perform full or incremental backups. Its main features are:

1. Can be mirrored to save the entire directory tree and file system;

2. It is easy to maintain the original file permissions, time, soft and hard links, without special permission to install;

3. Can synchronize data incrementally, file transfer efficiency is high, so synchronization time is short;

4. You can use RCP, ssh and other means to transfer files, of course, you can also through a direct socket connection;

5. Support anonymous transmission, in order to facilitate the site mirror image, etc.;

6. Encrypt transmission data, ensure the security of data;

Rsync-av/etc/passwd/tmp/0.txt

Rsync-av/tmp/0.txt 192.168.1.101:/tmp/1.txt

Format:

rsync [OPTION] ... SRC (source directory) DEST (destination directory)

rsync [OPTION] ... SRC [[Email protected]]host:dest

rsync [OPTION] ... [[Email Protected]]host:src DEST

rsync [OPTION] ... SRC [[Email protected]]host::D EST two colons

rsync [OPTION] ... [[Email Protected]]host::src DEST

Installing rsync

Synchronizing directories

Sync directly with IP

Second, rsync common options

-A contains-rtplgod

-r Sync Directory with the-R option similar to CP

-V synchronization displays some specific information to see the synchronization process

-L reserved Soft connection

-L plus option synchronizes source files when synchronizing soft connections

-P Small p maintains file ownership

-O Keep File owner

-G hold file of the genus Group

-D Keep Device file information

-T keep file Time properties

--delte Delete files that are not in src (source directory) in Dest (destination directory)

--exclude filter the specified file, such as--exclude "logs" will be the file name contains logs files or directory filtering, not synchronized

-P Large p shows the synchronization process, such as rate,-V more detailed

-U update Plus, if the file in dest is newer than SRC, it is out of sync

-Z Compression during transfer

Example: Synchronizing the/tmp/0.txt to the/root/ceshi.txt

Join behind/

Third, rsync synchronization via SSH

Rsync-av test1/192.168.1.106:/tmp/test2/

Reync-av-e "Ssh-p" test1/192.168.1.106:/tmp/test2/

Rsync is synchronized by service

To edit a configuration file/etc.rsyncd.conf

Start Service rsync--daemon

Format: Rsync-av test1/192.168.1.101::module/dir/

Two virtual machines synchronized with each other

First virtual machine synchronization root test1 to the second virtual machine/tmp/test2, you need to ensure that two virtual machines have rsync tools, and the directory must be created

Second virtual machine

Rsyncd.conf Sample Example

port=873

Log File=/var/log/rsync.log

PID File=/var/run/rsyncd.pid

Address=192.168.1.101

[Test]

Path=/root/rsync

Use Chroot=true

Max Connections=4

Read Only=no

List=true

Uid=root

Gid=root

Auth Users=test

Secrets file=/etc/rsyncd.passwd

Hosts allow=192.168.1.106 1.1.1.1 2.2.2.2 192.168.133.0/24

Linux centos7 rsync Tool Introduction, rsync common options, rsync synchronization via SSH