Posts Tagged common tools
Nagios plugin to parse JSON from an HTTP response
Hello all ! I wrote a plugin for Nagios that will parse JSON from an HTTP response. If that sounds interesting to you, feel free to check out my Github. The plugin itself is written in Ruby – 1.9 initially, but it’s compatible with earlier versions thanks to some excellent contributions from other Githubbers. Pull [...]
RabbitMQ plugin for Collectd
Hello all, I wrote a rudimentary RabbitMQ plugin for Collectd. If that sounds interesting to you, feel free to take a look at my GitHub. The plugin itself is written in Python and makes use of the Python plugin for Collectd. It will accept four options from the Collectd plugin configuration : Locations of binaries [...]
CPAN RPMs in RHEL / CentOS : generation, conflict, and solutions
Hello all ! Today we’re going to take a look at a somewhat obscure problem that – once encountered – can cause nothing but headaches for a system administrator. The problem relates to conflicts in CPAN RPM packages, and what can be done to work around the issue. If you’ve made it this far, i’m [...]
how to deal with broken time zones during a CentOS 5.3 kickstart
Hello again fair readers ! Today’s quick tip concerns the problem with missing time zones when deploying CentOS 5.3 (and some of the more recent Fedoras) in a kickstart environment. It’s a known problem, and unfortunately, since the source of the problem (an incomplete time zone data file) lies deep in the heart of the [...]
where to specify ethtool options in Fedora
Hi everybody – here’s a super-quick update for you concerning « ethtool », and how to use it to set options in Fedora properly. Ethtool is a great little tool that can be used to configure all manner of network interface related settings – notably the speed and duplex of a card – on the [...]
pohmelfs pt. 2, return of pohmelfs !
Hello again fair readers. Today i’m going to re-visit POHMELFS, which i introduced in an earlier blog post. I received a comment on that post which basically asked for more information on some of the more interesting (read : advanced) features of POHMELFS, such as distributed storage, and the like. Well, today is the day [...]
setting the from address in GNU mail
Today i’m going to address a question that comes up again and again on the various Linux help forums and mailing lists (in one form or another) : « How do i set the From address when using mail ? » Of course, « mail » in this case refers to that most basic of [...]
force disk geometry with sfdisk
Hello again ! This is a quick and dirty update which covers a handy little trick when dealing with writeable removable media – especially USB drives, compact flash cards, and the like. I end up using a lot of USB keys in my environment for a variety of reasons, not the least of which is [...]
pohmelfs – the network filesystem of the future !
Hello again fair readers ! Today we’re going to take a look at POHMELFS, which is a network file system that was just recently integrated into the Linux kernel. This is an excellent exercise for three reasons : we’ll learn about some great new concepts related to network file systems, we get to compile and [...]
initrd, modules, and tools
An explanation of initrd, how modules live within it, and an example of how it can be modified on a Fedora-based system. Contains supplementary information about gzip, tar, and cpio.