Rsync incremental synchronization in linux

In linux, the rsync incremental synchronization method-Linux Enterprise Application-Linux server application information. For details, refer to the following section. Run rpm-qa | grep rsync to check whether rsync has been installed.

The following describes the configuration process of rsyns.
1. Configure the server
First, edit/etc/rsyncd. conf as follows:
Uid = nobody # The user nobody for backup is any user
Gid = nobody # The backup group nobody is any group
Use chroot = no # Do not use chroot
Max connections = 10 # maximum number of connections
Log file =/var/log/rsyncd. log # log file

[Rsyncd] # Here is the Authentication Module name
Path =/home/test/# directory for synchronization
Ignore errors # ignore unrelated IO errors
Read only = yes # read-only
List = no # column list not allowed
Anth users = root # authenticated user name
Secrets file =/etc/rsyncd. secrets # password file storage address

Edit a rsyncd. secrets password under/etc to store the file.
Format:
Username: Password, for example, root: xl1100

Finally, start rsync on the server as a daemon.
Command: rsync? Daemon
Rsync starts at Port 873.

Ii. Client Configuration
Edit a rsyncd. secrets password under/etc to store the file.

Run the following command:
Rsync-vzurtopg -- progress -- delete root@192.168.100.150: rsyncd/home/test -- password-file =/etc/rsync. secret
Parameter v indicates a detailed prompt
Z indicates Compression
U indicates update only
Topg stores original file attributes such as the master and time parameters.
-- Progress indicates display
-- Delete: if the server deletes this file, the client also deletes the file to ensure true consistency.
Root is the user name
@ 192.168.100.150 is the Server IP Address
: The subsequent rsyncd is the authenticated Module name.
/Home/test is the name of the local directory for backup.
-- Password-file =/etc/rsync. secret specifies the address where the password is stored.

You can write the script rsync. sh.
#! /Bin/sh
Rsync-vzrtopg -- progress -- delete root@192.168.100.150: rsyncd/home/test -- password-file =/etc/rsync. secret

Then, add the script to the/etc/crontab file to regularly execute updates.