General Unix Information here (usually more systems-admin type information)

Backups

Easy Automated Snapshot-Style Backups with RSync (incremental too!)

Snapshot Backups on Laptops using Rsync

RDiff-Backup (Avail on Darwinports!)

SSH

Setting up SSH keys

Setting up ssh-agent forwarding

What is SSH Agent Forwarding

How to turn it on in OS X 10.5+:

    $ ssh-add -K   # only need to do this once, will add your private keys to the ssh agent

In .ssh/config section for that host, add

    ForwardAgent yes