2018-1-30 Linux Learning Notes

10.28 Rsync Tools Introduction

• The rsync command is a remote data synchronization tool that allows you to quickly sync files between multiple hosts via Lan/wan. Rsync uses the so-called rsync algorithm to synchronize files between local and remote two hosts, which only transmits the different parts of two files . Rather than the whole transfer every time, so it's pretty fast.
• rsync format:
  Rsync[option] ... SRC DEST//synchronization of local machines
  Rsync[option} ... SRC [[Email protected]]host:dest//Using a remote shell program (e.g. RSH/SSH) to copy the contents of the local machine to a remote machine
  Rsync[option] ... [[Email protected]]host:src DEST//Using remote shell programs (such as RSH/SSH) to copy the contents of the remote machine to the local machine
  Rsync[option] ... [[Email protected]]host::src DEST//Copy files from the remote rsync server to the local machine (start this mode when the path information contains "::" delimiter)
  Rsync[option] ... SRC [[Email protected]]host::D est//Copy files from the local machine to the remote rsync server
  For example:
  Rsync-av/etc/passwd/tmp/1.txt
  Rsync-av/tmp/1.txt 192.168.206.135:/tmp/2.txt

10.29/10.30 rsync Common Options

• Rsync Common options:
  -A contains-rtplgod
  -r Sync Directory with the-R option similar to CP
  -V Display information when synchronizing, let us know the process of synchronization
  -L Keep Soft links
  -L plus this option, synchronizing the soft links will synchronize the source files
  -P Keep File permissions property
  -O Keep File owner
  -G hold file of the genus Group
  -D Keep Device file information
  -T keep file Time properties
  --delete Delete files in dest that are not in SRC
  --exclude filter the specified file, such as--exclude "logs" will be the file name contains logs files or directories filtered out, not synchronized
  -P shows the synchronization process, such as rate, more detailed than-V
  -U plus this option, if the file in dest is newer than SRC, it is out of sync
  -Z Compression during transfer (to reduce bandwidth consumed during transmission)

10.31 rsync sync via ssh

• Rsync synchronization can be divided into two ways: SSH synchronization and service mode synchronization.

• Rsync syncs via SSH
  Rsync-av test1/192.168.206.135:/tmp/test2/
  Rsync-av-e "Ssh-p" test1/192.168.206.135:/tmp/test2/

• Rsync is synchronized by service
  To edit a configuration file/etc/rsyncd.conf
  Start Service rsync--daemon
  Format: Rsync-av test/192.168.206.135::module/dir/

2018-1-30 Linux Learning Notes