I've used this script to synchronize 2 public directorys inside 2 mongrel clusters. but you can use it to continously sync/mirror any 2 directorys on 2 different servers. note that it any change made will be committed instantaniously (or with a delay due to connection only) on the other directory. This uses inotify tools to know on any file create/change/delete and rsync to commit the changes on the other server.

rsync is a great tool for synchronizing 2 directories (or files) either one of them is remote and the other is local, or 2 local folders (it doesn't support synchronizing 2 remote servers, yet). the power of rsync comes from that it doesn't transfer anything unless it detects that it's changes since last run. moreover, it transfer the changes in files only (unless you specified otherwise), and it can even compress files before sending which makes it ideal for continuous backups and mirroring

I never thought that i could every write this, but according to this. it seems that it's wasn't that safe.
I'm holding my personal email on google, and i use google apps for this domain, and i'm totally depending on it and i guess everybody else does.

the problem was that if you was logged in to your gmail and you opened a webpage containing a certain code, this page could create a filter in your gmail to redirect some of your emails to another email address. simply check your filters to make sure you are safe.

Actually I'm posting this cause lots of people are asking me about what program should i use to do this and to do that, anyway these are my preferences they can be not the best things ever.

OS: GNU/Linux
linux destro for laptop/desktop: ubuntu, but planning to move my desktop to gentoo soon.
linux destro for servers: debian stable, though i use some packages from unstable repository. planning to try gentoo soon.
desktop enviroment: gnome & xfce. planning to try enlightment soon.
terminal: xfce-terminal, i like it.