![]() ![]() 1 big honkin' disk I got a 250GB monster, several times what I think I need, but we all know how disk space needs grow. In fact, there's no particular reason you couldn't put the OS on the data disk, assuming you can boot from it. 1 modest-sized disk for the operating system I had a 1.2GB drive lying around, but half that would do easily. I understand rsync does take more than trivial amounts of processing power and RAM, but I don't have numbers (if you do, please share). Ingredients 1 unused computer I had a 333MHz Pentium II with 128 MB RAM. Automate the process so the backups take place without user intervention, using keychain to manage the ssh keys.Use rsync over ssh to replicate the file trees.Establish a server to maintain copies of file trees owned by various users on any number of computers.I wrote this to save others the time and bother. In fact, it's simple and straightforward. I waded through a lot of verbiage before I understood how to do what I want. Also, much of the guidance on using ssh in scripts proposes using a key with a null passphrase, a Bad Practice. The manpage and the wealth of documentation that comes up in a Googleâ„¢ search can daunt the reader who simply wants backups, because most of it discusses other uses of rsync (for example, running a file server-essentially a more efficient ftp archive-and mirroring websites). It uses a clever algorithm to detect differences in files so that only the differences need be transferred, making regular backups efficient and fast. Rsync is a tool to replicate files between two locations, typically on separate hosts connected by a network. Describes a simple method to build and operate a server that maintains copies of specified client file trees, using the efficient rsync tool to capture changes, secure shell ( ssh) so that network connections need not be trusted, and keychain to allow ssh keys to be used in unattended operation.
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