Category: Tutorials
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LVM caching
Many of you are familiar with LVM (I’m sure of that because you must have at least installed some linux distro like something RedHat based with default options and got some partitions on LVM because of that) and maybe some of you are also aware of its “power” (if I can call it like that)…
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nscd on CentOS7 is being stupid
Today, while “playing” with my servers to get them to use LDAP for authentication, I realized that nscd on CentOS7 (possibly on other Linux distros as well) is being a bit stupid. Normally to get your Linux system to authenticate against LDAP you’d need to adjust quite a few config files (i.e. /etc/openldap/ldap.conf, stuff in…
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Annoying Let’s Encrypt
Let’s Encrypt (aka https://letsencrypt.org/) is a nice way to NOT spend money on SSL certificates for your websites (especially when you’re operating personal sites) BUT at same time it is fairly annoying when you have a setup that’s a bit different than standard ones. In my particular case, I’m running my site on multiple servers…
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My take on CentOS8
CentOS8 was released not too long ago by the RedHat ppl and after giving it some time to mature a bit I decided to take a closer look at it. Reading online about it I noticed they changed some stuff and improved other stuff but overall there’s not much I can call “special” about it…
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CentOS7 build environment (src.rpm -> rpm)
One of the things I hate the most about CentOS is the fact that once they release a new version they seem to also lock major versions of various packages with it like for example php or mysql which seem frozen in time, not to mention the kernel. My solution usually is to simply use…
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Linux security – Cristian style
This time we’re going to talk about security in context of Linux … that pesky topic everyone seems to be good at but then not quite good enough. Problem with security is that you can never have enough of it but at the same time you need to NOT get it in your way. Also…
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Redis cluster – Cristian style
I’ve been looking into getting some form of in memory caching for my sites BUT at same time do it in a way in which data would still be there in case of a crash and also do it HA style to be able to do maintenance on it without having some form of service…
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KVM – Nested virtualization
Ever wondered about the possibility of running VMs inside VMs ? If so then you’ll want to read further. In my particular case I have because (might have mentioned this before on my blog) I’m constantly “playing” with stuff for testing and proof of concept reasons. The HOW TO part: 1. Enable the settings for…
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virt-install kickstart CentOS 7 vs CentOS8
I’m a fan of KVM (for various reasons, one of which being the fact that it’s there in the kernel for free) and like to automate stuff as much as I can. Every so often I find myself needing to provision VMs to test or to deploy all sorts of setups and when that happens…
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Playing with ZFS on Linux
ZFS is one of the most advanced local filesystems you could store your data on. For more details feel free to check the wikipedia page: https://en.wikipedia.org/wiki/ZFS An online search for “install ZFS on centos 7” got me a few results … I selected this one: https://linuxhint.com/install-zfs-centos7/ which seems to be good enough For Gentoo things…