There are times when you really want to get rid of SSH password authentication, however SSH is VERY picky about permissions etc. I just found out that there's a tool for that in all Linux boxes!
There are times when your website's filesystem permissions get screwed. There's no other way to put it -- some directories are not writeable, some are not ... ARGH! The worst part is that you need to apply different permissions on files and directories, to prevent security issues.
For all (well most) of your console compressing / uncompressing needs, tar is there. All you need to do is set it to work.
Assuming you've spend anything more than an hour with a Linux server on the developer/admin side of things, you've most likely bumped into the filesystem permission scheme.
There have been a number of times when I've realized that I must restart some service at a production server. In such enviroments, restarting a critical service ( e.g. MySQL on a webserver ) in a production enviroment is simply a no-go during hours with traffic. And since the lowest possible traffic is during morning's early hours, you can either "schedule" your service restart to occur after going out with friends for a couple of beers, be awake {until|at} that time.... or simply let your server know that something needs to be done at that time.