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oVirt 4.* add HA for HostedEngine

Today I describe how to enable the high available feature in oVirt with two hosts. Normally this should be enabled during adding one host but it can also be enabled afterwards as well. Shut down or migrate all VMs for the given host Put the host into maintenance Reinstall oVirt Set Hosted Engine to “deploy” Now you should see a crown beside the hostname You can migrate the HostedEngine to …

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Synchronize multiple Smart Light Bulbs

Today I describe how to synchronize multiple Smart Light Bulbs with one main bulb. You can set the color temperature and brightness for one main lamp, in this example the kitchen, based on this lamp other lamps are synchronized. It is not necessary that the lamps are online during changing the color temperature or brightness. Lights which are offline will get the new configuration after they are turned on. Environment …

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GPG high CPU usage

Today I had a very high CPU usage while using GPG. I found the answer inside the following ticket https://dev.gnupg.org/T3972 The high CPU usage was caused by a process like this /usr/bin/gpg –charset utf-8 –display-charset utf-8 –no-auto-check-trustdb –batch –no-tty –status-fd 2 –with-fingerprint –fixed-list-mode –with-colons –list-secret-keys ***** The reason is a huge key in ~/.gnupg/pubring.gpg. Mine was 37MB!!! Thanks to “dkg” who publish the following awk script: < ${GNUPGHOME:-~/.gnupg}/pubring.gpg gpg –list-packets …

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Can’t enable FileVault (Full-disk-encryption) with APFS

I got a MacBook Pro which has been updated to macOS Mojava (10.14) and stuck in enabling FileVault with following errors: Authentication server failed to complete the requested operation Authentication server refused operation because the current credentials are not authorized for the requested operation. Solutions which are not working for my situation: Check and remove CryptoUser from APFS with diskutil Reset and change the UUID of the admin user Convert …

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Connect Barcode Scanner Datalogic QuickScan QBT2101 with Windows 10 and add Tab as Suffix

Below you find the steps to connect a Datalogic QuickScan QBT2101 Barcode Scanner and Windows 10 with Bluetooth and add Tab-Key as Suffix after the scanned code. What is a Suffix? References: Official manual Datalogic – most commonly used suffixes You can find the used Barcodes from the references, for easy reproduction I have copied them into this article. Scan variable barcode Scan Link code Search and connect from Windows. …

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