another meaningless subtitle

uwot.eu

last update:

AMD Ryzen on Linux

Finally we have some new hardware worth writing of – and also spending money on. I have been using an AMD Ryzen 7 1700X based build for some time now and so far I am really liking it, the CPU is marvelous considering the pricetag and felt like a worthwhile upgrade from the Xeon E3-1241v3 I was using before; it is basically twice the cores clocked at pretty much the same speed.

Handbrake cannot be installed from default repos nor rpmfusion, to get it on Fedora 25 there are two other options: 1. use negativo17 third party repository; 2. compile from source. The first option is, but that is my opinion, subpar because I don’t trust third party repositories; option two is what is left. Download the source code from git and install some dependencies: $ git clone https://github.com/HandBrake/HandBrake.git $ sudo dnf install dbus-glib-devel gstreamer1-devel gstreamer1-plugins-base-devel intltool libgudev1-devel libnotify-devel webkitgtk3-devel libgudev-devel dbus-glib-devel webkitgtk3-devel gstream-devel libnotify-devel gstreamer1-devel gstreamer1-plugins-base-devel lame-devel opus-devel fribidi-devel libass-devel libtheora-devel x264-devel nasm Like I do with every other program I like to keep as much up to date as possible, I have a small script to take care of compilation, installation and upgrade processes for me.

OMEMO is the new-ish state of the art end-to-end encryption XMPP protocol extension, Gajim support it via a plugin but making it work on Gentoo is not straightforward at all. Gajim’s OMEMO plugin requires python-axolotl package to work, since that is not present in Gentoo’s repositories it must be installed from source. Before doing so a couple of dependencies must be installed first: $ emerge -a dev-python/protobuf-python $ chmod o+w /usr/lib64/python3.

## This does not really works, read this: https://uwot.eu/blog/monitor-hard-disk-smart-status-in-python/ ## First of all install smartmontools, it has the same name on pretty much every distro: $ emerge -a1 smartmontools Proceed to edit its configuration file, at the bottom of the file there is a quick explaination of all the available parameters: DEVICESCAN -H -R 1 -R 5 -R 7 -R 10 -R 11 -R 196 -R 197 -R 199 -R 200 -m user@domain.

Android community is one big cancerous clusterfuck, it is no wonder that finding a decent guide on how to compile Android from source written in a somewhat comprehensible english is pretty much mission impossible. Cyanogenmod Inc. shutting down their wiki and services overnight surely didn’t help either. Required packages on Fedora 25 are (rpmfusion repo must be previously installed): $ sudo dnf install screen java-1.8.0-openjdk-devel git schedtool ncurses-devel ncurses-libs ncurses-compat-libs ImageMagick-devel libstdc++-devel bison gnupg lzma For some reason the compilation process stores some temporary files in /tmp which, in Fedora 25, is mounted on a tmpfs ramdisk.

Android stores application’s data in /data/data directory, it can be accessed via adb only on a rooted phone. To make a backup copy the correspondent directory: $ adb root $ adb pull /data/data/eu.siacs.conversations Application’s data can also be extracted from a full system backup made with TWRP: $ tar -xvf data.ext4.win000 Restoring the backup is the tricky part since Android uses SELinux and every app has it’s own unix user.

Btrfs is fairly stable and with the latest kernels it is becoming even a better alternative to the most commonly used EXT4 and XFS filesystems. While not being always better or faster it brings to the table a huge amount of improvements that makes it by far the best filesystems for storage. XFS itself is moving in the very same direction and will probably have in the near future some of the features Btrfs already has (e.

XMPP’s module HTTP File Upload (formerly XEP-0363) provides a way to share files between XMPP clients, it works transparently and even in multi user chats. The sender uploads a file on an HTTP(S) server that will then generate an URI, this is sent to each one of the recipients that can then download it. The interesting bits about this XEP are various: 1. File sharing now works even in multi-user chats (MUC), in any case the file is only uploaded a single time even if the recipients are more than one.

Sparse files are nice to use to store virtual machine’s virtual disks but can be a real pain in the ass to backup efficiently, especially over the network. Luckily rsync provides a way to intelligently copy sparse files both locally and over the network. The trick is use –sparse and –inplace options. Let’s say we have a sparse 60 GB qemu virtual disk with only around 7 GB used: $ ls -lh fedora24.

All Cyanogenmod 13 nightly builds past July 28 seem to be affected by a bug that makes the phone reboot just a few seconds after opening the Gallery application. The issue seems to be related to the newly added support to sdcardfs which obviously isn’t playing well at the moment. A workaround to prevent the phone from crashing and rebooting is to edit the build.prop file located in /system; this can be done either via adb using the command adb shell or more practically directly on the phone using the built in file manager and text editor (provided that in file manager’s settings access mode option is set to Root access mode).