简单rsync备份脚本。

Posted 2021-02-26

This script pulls in files with [rsync](http://samba.anu.edu.au/rsync/), storing them locally with hardlinks for unchanged, and real files for changed -files.

* KEY=$HOME/.ssh/id_dsa_passwdless -- an id_rtsa key without a password. --adding this to remote authorized keys must be done with care: you will prbably want to whitelist one IP-adress.
* RHOST=ssh.example.com -- the host where to connect to using ssh, or rsync.
* RUSER=example-username -- the username on the host. Must have _read_ access in the SOURCE dit (see below).
* LPATH=$HOME/Archive/example-com/ -- where to place the backups
* RPATH=/var/www/example-com/ -- the to-be-backuped dir.

You probably want to add this as script (`backup_example-com.sh`) in `~/bin`, or any other directory available in `$PATH`. And then add it to crontab.

See a howto here: http://troy.jdmz.net/rsync/index.html

#!/bin/sh
 
RSYNC=/usr/bin/rsync
SSH=/usr/bin/ssh
KEY=$HOME/.ssh/id_dsa_passwdless
RUSER=foo
RHOST=ssh.example.com
RPATH=/var/www/
LPATH=$HOME/archive/example-com/
 
date=`date "+%Y-%m-%dT%H:%M:%S"`
 
$RSYNC -v -n -az -e "$SSH -i $KEY" --link-dest=$LPATH/current $RUSER@$RHOST:$RPATH $LPATH/back-$date
 
rm $LPATH/current && 
 ln -s $LPATH/back-$date $LPATH/current