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Migration from OpenLDAP 2.3 to 2.4

By Vratislav Hutsky Posted on 25. 8. 2018 Posted in Operating systems Tagged with centos, ldap, linux

Note: I wrote this post during Christmas break 2017, but it took me some time before I managed to give it a better form, verify the steps again and publish it. Hence some Xmas references in a text published during …

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Debian buster and wake on lan

By Vratislav Hutsky Posted on 3. 3. 2018 Posted in Hardware, Operating systems Tagged with debian, linux, networking

For quite some time, I used to have a low-end motherboard that didn’t support Wake on LAN. So when I left for work or holiday, I would usually leave my home PC on, because sometimes I just needed to access …

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Weekend hobby – PC cleaning

By Vratislav Hutsky Posted on 21. 1. 2018 Posted in Hardware Tagged with hardware

This is a PC that belongs to my brother in law. He hasn’t been using it for over a year, ever since he switched to Mac, so he’d like to get rid of it. It has i5 (Sandy bridge) inside …

Weekend hobby – PC cleaning Read more »

KVM: Cannot find any matching source devices for logical volume group vg2

By Vratislav Hutsky Posted on 7. 1. 2018 Posted in Hardware, Operating systems Tagged with centos, hardware, linux

I installed Centos 7 on a brand new machine about a half a year ago, and set up KVM with two data pools – one just a regular directory for old raw images, the second being an LVM volume group. …

KVM: Cannot find any matching source devices for logical volume group vg2 Read more »

IPv6 with gateway in a different subnet

By Vratislav Hutsky Posted on 15. 9. 2017 Posted in Operating systems Tagged with centos, networking

I’ve run across this peculiar problem. I was trying to set up IPv6 on a Centos 6 machine. I thought that it would be a simple task – a couple of minutes at most – as I had done that …

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Raspberry Pi – analog output noise

By Vratislav Hutsky Posted on 19. 2. 2017 Posted in Hardware Tagged with debian, hardware, NAS, OS, remote desktop

I got Raspberry Pi 2 as a present from my brother. It’s a nice toy, I was trying out OpenELEC, it makes for a really nice home theater in combination with a NAS on local network. The only drawback was …

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Scroll emulation with Trackman Marble in Debian 9

By Vratislav Hutsky Posted on 4. 2. 2017 Posted in Hardware Tagged with debian, hardware, linux, mate

Spending a lot of time with mouse and keyboard, I decided I would give it a try with trackball. A friend lent me Logitech Trackman Marble for a week to see if I can get used to it. The one …

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header_checks and Spamassassin headers in Postfix 2.6

By Vratislav Hutsky Posted on 3. 7. 2016 Posted in Operating systems Tagged with centos, linux, networking

I’ve had this mail server of mine for some time. I was an early adopter of Gmail back then, but as years went on and it became obvious that messages were data-mined by Gmail, I eventually started running my own …

header_checks and Spamassassin headers in Postfix 2.6 Read more »

Apache and umask 002

By Vratislav Hutsky Posted on 9. 6. 2016 Posted in Operating systems, Web-related Tagged with apache, centos, linux, nginx, web

I ran into a problem with Apache on Centos 6. For some time, I was the only person who had access to this particular machine so permissions were not a problem. However, now that somebody else is taking care of the website …

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“Lazy” Synolocker

By Vratislav Hutsky Posted on 26. 3. 2016 Posted in Hardware, Operating systems Tagged with hardware, NAS

A funny thing happened to me the other day. Someone brought me a 4-bay Synology NAS which had been hit by ransomware called Synolocker. The usual scenario – the NAS was exposed to the internet, maybe not updated as regularly …

“Lazy” Synolocker Read more »

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About me

linkedinMy name is Vratislav Hutsky. I work as Associate Manager at Red Hat. Before that, I was a freelance server admin and developer.

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