Toralf Lund wrote: > On 11/03/14 14:17, zGreenfelder wrote: >> On Tue, Mar 11, 2014 at 8:38 AM, Toralf Lund <toralf.lund at pgs.com> >> wrote: >>> >>> /I need to implement a system of disk space checks and warnings for a >>> client-server setup running CentOS 6. Simply put, I just want a warning >>> popup rather like the ones given by gdu-notification-daemon when server >>> file system is full or nearly full, but they should appear on the >>> client display(s) rather than locally, and must also work when nobody is >>> logged directly in to the (server) system. >> it sounds like you think you want to send popup windows across from >> one system to many remote machines. this seems like a path of >> madness to me; full of potential problems like x windows security, or >> if you write your own little daemon to accept messages and display a >> box, misuse/abuse from playful users. > Not really worried by those things in this context. > > The setup is only physically accessible to a very limited group of > trusted users, and access to or from the outside world is restricted by > all sorts of firewalls etc, and also only available via a very slow and > unreliable link... > >> I think you should build a >> monitoring system (nagios, xymon, opennms, several others or perhaps >> your own if you're feeling far too adventurous) instead. right now >> all you care about is disk space, but eventually someone will want to >> also check for certain processes, open ports, logfile entries, >> something and you could spend the time now to put in the hooks for >> more advanced things and get people in the habit of checking a >> monitoring system on a regular basis. > In general, that might make sense, but please consider the fact that I'm > not talking about a "general" server system. It's a machine dedicated to > running a "server" component on one specific software package, and will > only ever be contacted by a handful of "display" machines running a GUI > component of the same piece of software. <snip> In general, I agree with the other posters. What may only have very limited accessibility *now* doesn't say anything about next week, or the next manager who comes in's intent. But to directly answer your question, here's a thought: does the software you're running have the ability to do pop-ups? If so, can you get a message to it - a d/b entry, or a file that it can read? If so, have it do the alert. mark