Introduction to common options of file synchronization tool Rsync and data synchronization through services

rsync -av /etc/passwd  /tmp/1.txt      Follow cp  Command similar   
-v  Show Visualization  
-a（rtplgoD）  -a Include these options 
-r When synchronizing the directory, add , similar cp At the time of the -r Options 
-v Display some information during synchronization , Let us know the process of synchronization  
-1 Keep the soft connection 
-L With this option added , The source file will be synchronized when the soft link is synchronized 
-p Keep the permission property of the file 
-o Keep the owner of the document 
-g Keep file group 
-D Keep device file information 
-t Keep time attribute of file 
--delte Delete files that are not in the source in the destination （ Means to add... When copying or backing up   Consistent source and target ）
--exclude  Filter specified files , Such as --exclude“logs” The filename will contain logs Filter out files or directories , Out of sync 
-P （ uppercase P） Show synchronization process , Like speed , Than -v More detailed 
-u With this option added , If the file in the destination is newer than the source , It's not synchronized 
-z Compression when transmitting 


     

      
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（ Both local and remote machines must have rsync command    If not, just use yum install ）

 The biggest difference is that it can be copied remotely   （ Local copy to remote copy , Remote copy to local ）
 Format ：
rsync -av /etc/passwd  [email protected]:/tmp/1.txt    Local to remote 
rsync -av  [email protected]:/etc/passwd /tmp/1.txt    Remote to local 
 similar ssh
 If the port of the other machine is not 22 have access to -e
rsync -av -e 'ssh -p 22' /etc/passwd  [email protected]:/tmp/1.txt
 Use -e  Appoint ssh -p Appoint 22 port   De link 


     

      
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 This method requires starting a service , Client server , The server opens a rsync Service and listen on a port ,
 The default port is 873（ You can change ） After opening   The client can communicate through this port , And then transmit data 
 Command format   yes   Two colons “::”
 You need to edit the configuration file before starting the service /etc/rsync.conf 
( This is the default path  , It can also be written elsewhere , If it is written elsewhere 
 When starting the service, you need to add special options and specify the path )


     

      
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vim /etc/rsyncd.conf   Open profile   Add the following 

port=873                      ### Customizable port 
log file=/var/log/rsync.log   ### Log file path 
pid file=/var/run/rsyncd.pid   
address=192.168.44.128        ### Specify the IP  If you don't write, listen to all  '0.0.0.0:873'
[test]                        ###  Module name 
path=/tmp/rsync               ### Specify the path of file transfer and storage 
use chroot=true                
max connections=4             ### Specify the maximum number of connections   0  For unlimited 
read only=no                  
list=true                     ###ture  Indicates when transferring files :: The module name can be listed if you execute directly without following the module name 
uid=root
gid=root                      ###uid、gid Indicates the specified identity for transmission 
auth users=test                 ### Specify the user name when transferring 
secrets file=/etc/rsvncd.passwd ### Define whether to enter a password during transmission 
hosts allow=192.168.44.131      ### The definition allows that IP Connect    You can use spaces to define multiple IP

 add 
auth users=test                 ### Specify the user name when transferring 
secrets file=/etc/rsvncd.passwd ### Define whether to enter a password during transmission 
 After these two lines, you need to define the password file 
vim /etc/rsvncd.passwd     Add the following user name and password 
test:123456         
 Add after saving and exiting 600 jurisdiction 
chmod 600 /etc/rsvncd.passwd
 Then create the specified file storage path and increase permissions 
mkdir /tmp/rsync
chmod 777 /tmp/rsync  （ Test use   Do not fully open the permission for normal use ）


     

      
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rsync --daemon         Start the service 
ps aux | grep rsync    View service 
netstat -lntp          View listening port  

     

      
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 Then test on the remote machine   （B machine ）
 Log in to the remote machine 
 Edit execute command 
rsync -avP /root/123 [email protected]::test/555  
 take B machine root Under the 123  copy to A（ Local ）  Ahead test Is the user name   hinder test Is the module option ,
 Changed the name later 555 Copy to the transmission path defined in the configuration file /tmp/rsync/ Next 

 If you fail   Check whether the firewall is not turned off    Can the address ping through   873 Whether the port can be connected 

 Execute successfully A machine /tmp/rsync/ Check out   

 You can also transfer the files of the other party to the local 
 Just adjust the position 
rsync -avP  [email protected]::test/555  /root/123

ps：  If you feel that every time on the client （B machine ）  It's troublesome to enter a password when transferring files 
 It can also be in B Create the same password file on the machine 
vim /etc/passwd.txt    Join password （ The difference is   Just add a password ）
123456
 Save add 600 jurisdiction 
chmod 600 /etc/passwd.txt 
 And then when you use it   Need to add  --password-file
 for example    （ You can also add the specified port number ）
rsync -avP /root/123 --port 873 --password-file=/etc/passwd.txt   [email protected]::test/555   
 In this way, you can execute without entering a password 

     

      
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 ditto   If you will rsync After the port number in the configuration file is changed   such as  873  Change to 888
 Need to restart rsync  The service will take effect 
killall rsync   Stop the service 
ps aux |grep rsync   Check to see if it stops 
rsync --daemon   And then open the service  
netstat -lntp      Verify and view the listening port 

 At this time, an error will be reported when using the following command again   because 888 Port is not open  
rsync -avP /root/123 192.168.44.128::test/555
 So you need to specify 888 port   Use --port
rsync -avP --port 888 /root/123 192.168.44.128::test/555   This can be done 

     

      
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