19I have been using Cacti, a RRDTool-based graphing solution, to monitor my servers/VPS over the last year or two (and before that, with MRTG). My needs are simple — I just need graphing of several server metrics and Cacti fits the bill perfectly when the data is well supplied. Cacti is installed on one [...]
Compiling with DistCC on low memory VPS
Two months ago I had written an article on tuning GCC parameters for compilation under low-memory VPS, by limiting the maximum memory it can use, which is often useful on user-bean-counter based VPS’s (OpenVZ and non-SLM Virtuozzo). It worked in most cases on my 256Mb VPS at VPSLink, but in some circumstances the packages just [...]
Greylisting Spams with Postfix + Gld
If you have an email address for a while, you’ll know that “spams” are almost inevitable. Once the email address has been used, spams will find their way there sooner or later. Combating email spams has also become one of the most researched topics these days.
Greylisting is a relatively new method to use against spams, [...]
Compiling with GCC on low memory VPS
There is an interesting forum post explaining how you can get Gentoo to emerge essential packages on VPSlink’s basic VPS with only 64Mb of memory! I originally thought it would be impossible, but by mangling GCC’s garbage collection parameters it indeed can be done.
Use Dropbear SSH to save memory
In this blog post I will be looking at cutting down the memory used by the Secure Shell daemon running on your VPS, by replacing it with a lite-version that does 90% of what OpenSSH can do — Dropbear.