Install and configure rsync files in centos

The rsync directory is mainly used for file synchronization. Now, record the configuration used.

2 Test machines
Rsync server IP: 192.168.171.22
Client IP: 192.168.171.134

Rsync server operations
Check whether rsync is installed

Rpm-qa | grep rsync
Install rsync and manage rsync through xinetd

Yum-y install rsync xinetd
Check startup. The default port is 873.

Netstat-an | grep 873
Rsync starts with xinetd.

Vi/etc/xinetd. d/rsync
Change disable = yes to disable = no

Create the file required by rsync

Mkdir/etc/rsyncd
Touch/etc/rsyncd. conf # Main configuration file
Touch/etc/rsyncd. secrets # verify the user and password storage location
Touch/etc/rsyncd. motd # server description
Ln/etc/rsyncd. conf/etc/rsyncd. conf # Create a link
For password security, we set the permission to 600.

Chown root: root/etc/rsyncd. secrets
Chmod 600/etc/rsyncd. secrets
Modify the main configuration file

Vi/etc/rsyncd. conf
Add the following content

# Run the command with the root permission when the server transfers files
Uid = root
Gid = root
# Specify the service port. The default value is 873.
Port = 873
Use chroot = no
# Read-only: prevents the client from uploading files to the server
Read only = yes
# Limit access to private LANs
# Restrict the network segments that can access the service
Hosts allow = 192.168.0.0/255.255.0.0
Hosts deny = *
# Maximum number of connections
Max connections = 5
# Tell the process to write to this file
Pid file =/var/run/rsyncd. pid

Secrets file =/etc/rsyncd. secrets
# Lock file =/var/run/rsync. lock
# Server information definition points to this file, which can be written to server information. Welcome text
Motd file =/etc/rsyncd. motd

# This will give you a separate log file
Log file =/var/log/rsync. log

# This will log every file transferred-up to 85,000 + per user, per sync
Transfer logging = yes
# Log file format
Log format = % t % a % m % f % B
Syslog facility = local3
Timeout = 300 # timeout

# MODULE OPTIONS
[Testhome]
# Synchronized Directory
Path =/home/test/
List = yes
# Ignore IO errors
Ignore errors
# Verify the user. My user is cs.
Auth users = cs
Comment = test home
# Non-synchronous directories
Exclude =. git/
Modify the rsyncd. secrets and rsyncd. motd files

Vi/etc/rsyncd. secrets
Add content

Cs: 123456
Cs users are not system users.

Vi/etc/rsyncd. motd
Add content

++
Welcome
++
Firewall settings (rsync default port 837)

Vi/etc/sysconfig/iptables
Add

-A input-p tcp-m state -- state NEW-m tcp -- dport 873-j ACCEPT
Restart service

Service xinetd restart
Client Operations
Install rsync

Yum-y install rsync
Test

Cs@192.168.171.22: testhome/home/test
The above Command means to use the cs user to log on to the server and save the data in the directory specified by testhome to my local/home/test

Synchronization command description:

1. Display directory content

Command
--
A) rsync
B) rsync-r
C) rsync jack@192.168.0.1 ::
D) rsync ssh_user@192.168.0.1:

Command description
---
A) display directory content (level 1)
B) recursively display directory content
C) display the remote host directory content
* Note 1: Port mode, based on rsync user authentication
* Note 2: The Directory on rsync server must have the xx7 permission.

D) view the remote host Directory
* Note 1: In remote shell mode, authentication based on the identity of local users connected through ssh
* Note 2: Only one colon (:) is used here, and the user name is the ssh user of the remote host, and the password is also the password of the ssh user.
* Note 3: use "to list information about the folder itself. To list folder content, use "/".

Parameter description
---
-R performs recursive operations on directories.

2. Synchronization between local directories

Command
--
A) rsync-av-progress/*** note (/)***
B) rsync-av-progress
C) rsync-avu-progress-delete/
D) rsync-av-progress-temp-dir =/tmp/

Command description
---
A) synchronize all files under the src-dir directory to the dst-dir directory.
B) synchronize all files under the src-dir directory to the dst-dir/src-dir directory.
C) update the src-dir directory content to the dst-dir directory for differential updates. If there is an increase/update, add or replace it. If there is a decrease, delete it.
D) more-temp-dir =/tmp than a), that is, specify/tmp as a temporary swap zone, so as to avoid file synchronization errors caused by insufficient space in the target directory.

Parameter description
---
-A is equivalent to the-rlptgoD set.
-U is equivalent to-update. It is not updated when the target file is newer than the source file.
-V: display synchronized files
-Progress displays the percentage progress and transmission rate during file synchronization.
-Delete: delete files in the target directory that are more than the source directory.

3 synchronization between remote hosts
Command
--
A) rsync-avz-progress jack@192.168.0.1 ::/
B) rsync-avz-progress jack@192.168.0.1:/-password-file =/home/jack/rsync. jack
C) rsync-avuz-progress-delete jack@192.168.0.1:/-password-file =/home/jack/rsync. jack
D) rsync-avz-progress jack@192.168.0.1 ::/

Command description
---
A) synchronize the contents of the local directory to the Directory of the remote host 192.168.0.1. jack is the rsync database user (see 3./etc/rsync. secrets)
B) synchronize non-interactive login files by automatically reading user passwords
C) more than B)-u and-delete
D) synchronize the remote host content to the local directory