Using Kernel same-page merging can greatly reduce the amount of memory used on a Linux system, especially when the machine is used as a VM hypervisor. To enable KSM you can follow the steps below. Optional, adjust the frequency in which the KSM service scans for duplicate memory pages Enable…
Building RPMs for EasyApache 4
I’m excited to announce my next tutorial in the cPanel for Sysadmins series will be about how to build RPMs for EasyApache 4. We’ll take a look at deconstructing existing PHP version RPMs and how to use their spec files to build our own custom RPMs for PHP versions that…
Using cPanel’s standardized hooks system
Working with Standardized Hooks While cPanel’s standardized hook documentation is great it lacks practical examples of how to add and remove non Perl based hooks. We’ll be looking at how to implement a simple bash script to maintain custom entries to Apache’s PHP configuration file across handler and PHP version…
cPanel Tutorials
cPanel for sysadmins! This will be a series of tutorials on some of the more advanced things you can do with the cPanel web hosting automation software. We’ll be covering everything from building RPMs for use with EasyApache 4, automating tasks with the various APIs, standardized hooks to running your…
Taskwarrior CentOS 7 RPM
For some reason Taskwarrior doesn’t provide a CentOS 7 Taskwarrior taskd server RPM. I have created an RPM for the taskd Taskwarrior service, enjoy.
New site hosting
A large chunk of content on this site was lost due to the power outage mentioned in the Gitlab post and like the good admin I am, my backups were hosted on the same server as the VM hosting this site. Luckily I did have some older backups on my workstation at…
Hostname woes on cPanel + OpenVZ / Virtuozzo containers.
I have recently run across an issue a few times in the last week where OpenVZ / Virtuozzo 7 containers are having their hostnames reset to the short hostname. The usual culprit is the hostname not being set correctly on the node but in this case, on OVZ7, this is…
GitLab server
I’m now running my own public GitLab instance at https://gitlab.donthurt.us. Feel free to signup and start hacking!
Performance monitoring with Sysdig
The Sysdig software seems highly geared towards containers like Docker but it works just as well on bare metal. The software is scriptable much like dtrace is. In order to work with this utility we must first install it. Download the following playbook, set the correct IP address in the…
New multi-rotor
My new jankily built quad copter. I plan on tidying up the wiring eventually now that I have all the parts I like but since Lorraine and I are moving to Huston, Texas next week that will have to wait. Specs: FC: Naze 32 afro RX: Spektrum AR6200 VTX: ImmersionRC…
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