Everything that has a beginning…

…has an end. It’s one of my favorite quotes, I’ve even got it tattooed on my side. Although the quote isn’t really Buddhist, for me it signals one of its core teachings though and that is ‘impermanence‘. Everything is always changing and eventually comes to and end. But all these fancy words aside: this blog…

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RHEL / CentOS nmcli madness II

While writing, last weeks post became pretty awesome and should be a great, solid basis for your understanding of nmcli and network configuration in general. This week I’ll be getting more into the RHCE part of nmcli: teaming network interfaces for high availability, backup and failover and aggregation. Let’s get started.

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RHEL / CentOS nmcli madness I

RHCSA is in the bag. I took the RHEL 8 exam and passed with a whopping 283 of 300 points. Next up is RHCE 7 (version 8 is completely Ansible related which will come at a later time), which for me is a whole different ballgame. So what about this nmcli madness? Continuing my RHEL…

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ACLs: Linux advanced privileges

Another part of the RHCSA exam is some advanced privileges, mainly reading and setting Access Control Lists (ACLs). Again not too complicated, but its good to have some pointers. Probably more familiar to you are standard POSIX permissions: permissions for the owner of a file, a group and all others. But what when you need…

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Setup a NFS client on Red Hat / CentOS

So this first thing that needs a bit of work on my end, starting on my RHCSA adventure, is to setup a NFS client. It’s not too hard but there are a couple of things to consider and things like firewall and SELinux that can be easily overlooked. The RHCSA exam focuses on the NFS…

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Hi Red Hat!

A Red Hat introduction. Recently (this May) I’ve passed the LFCS exam with the help of my friends of Linux Academy and switched jobs at the beginning of this month to a super professional Linux company. This spices things up a lot. At my former company, the choice of poison were Debian based distributions (Debian…

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Fast Postfix and Dovecot setup on Ubuntu 18.04

More than a year ago I did a comprehensive multiseries walkthrough about how to setup a mailserver using Postfix and Dovecot, with antispam, database backend, etc. I’ve been running it ever since without a hiccup. For my recent LFCS certification I had to brush up on this knowledge a bit and wanted to find out…

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BIND primary and secondary DNS server

Last weeks BIND post cost me more time than I could’ve imagined. You can have a forwarding or caching server running in a matter of minutes, but fiddling with listening addresses and ACLs took me a bit more time. In retrospect, it was not hard, but I stumbled upon a couple of problems like the…

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BIND forwarding and caching DNS server

For my recent exam I had to study how to setup a BIND caching DNS server. Since this was too easy, I decided to make it a full featured primary and secondary DNS server, but that’s for the next post. I mentioned the BIND setup with a colleague of mine and he, somewhat jokingly, asked…

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Linux swap file and encrypted volumes

As with the last post, this seems like two pretty different subjects, a swap file and encrypted volumes, but for me it makes sense, because it’s all in preparation for the LFCS exam as mentioned here and here. First I want to make a small addendum on the creation of swap space; this time a…

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Setup Linux swap and quotas

Swap and quotas. Two seemingly random subjects in one post, but for me it really has a purpose: preparation for the LFCS exam as mentioned here and here. The exam might also contain questions on encrypted storage, linux RAID and automounting of samba shares, but to me this seems so random and not at all…

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Create and expand volumes using LVM

My coming LFCS exam as mentioned in my last post, consists of about 15% of storage specific questions. LVM has a large part in it. Since I rarely need storage tools (it’s so much easier in a virtual environment), I decided to write something about it, to hopefully make it stick in my mind. Pretty…

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Short update on the 2019 plan

Short update post about a lot that has been going on and has or is about to change. This will affect the posts on cloudpro.zone so that’s the reason I’m updating you. These changes will most probably affect the post frequency and will for sure affect the post quality. Frequency because after marrying, we’re moving…

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Grafana dashboarding using Graphite

Something completely different in contrast to the last few weeks: Grafana dashboarding, using Graphite metrics. A great while ago I’ve introduced and setup Icinga 2 and Icinga Web 2 to monitor our relatively new managed hosting platform. I’ve written a couple of posts about it, starting here. Not too long after that I’ve added Graphite…

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