Author Archives: mark
qemu-img shipped with fedora corrupts qcow2 disk images
Up to and including F38 there were no problems with using qemu-img to compress disk images. On both F29 and F30 using qemu-img to compress a qcow2 disk image results in severe virtual disk corruption, visable as virtual machines dying … Continue reading
Free OpenSource Project Managers for small business and home users running Linux servers, I chose WebCollab
This is by no means a comprehensive post, it only covers three, two I looked at and discarded and the one I finally settled on for home use. OpenProject – discarded, I did not evaluate it First there must be … Continue reading
Obtaining CherryTree under f31
I, like many people, when Fedora no longer included the essential Desktop note taking app BasketNotes in its repositories migrated to the CherryTree application which was functionally compatible with BasketNotes and could import the BasketNotes data files, so no data … Continue reading
How to fsck a Linux system at boot time
The old method of creating a file with “touch /forcefsck” should still work on modern systems even though it is a hangover from the old sysvinit days, however it obviously relies on the root partition being mountable in order to … Continue reading
Fedora31 released, buggy as always
In the upgrade from f29 to f30 I lost ownCloud, which is not supported with the version of php shipped with f30. While a pain I could live with that. However in the upgrade from f30 to f31, while it … Continue reading
Using apache rewrite to automatically add iptables drop rules
In these days of firewalld not many people still use native iptables rules, but they certainly still have their place. I still use them on my main webserver simply because of the ease with which new drop rules can be … Continue reading
Docker and issues with using minimal Fedora base images
It is recomended when creating docker images that minimal images be used. In the case of Fedora it is recomended that for smallest images the minimal image should be used and “microdnf” be used instead of the full blown “dnf” … Continue reading
Installing a F30 network install and recovery server
In these days of cloud images being launched at the push of a button, and customised via heat patterns or user configuration scripts, network install via pxe boot seems to have dropped out of the news. As most home users … Continue reading
Docker container network isolation can be a pain.
I have been embarking on an exercise to migrate some of the smaller applications I use into Docker containers. This is the reverse of my prior more secure approach where I wanted 3rd part apps that may be insecure but … Continue reading
Docker Isolation, and non-Isolation
Docker is not KVM, there are major security trade-offs with a container, The key ones are shown below. Processes are not isolated The processes that are run by containers run for all intents and purposes as processes on the Docker … Continue reading