Proxmox - Netfilter POSTROUTING SNAT rules not hit Proxmox comes with extensive firewall rules, which can be configured and managed through the web interface. The setup creates a number of chains, and the rules that are automatically configured can get extensive
Linux Grub on MSI GS43VR (UEFI) UEFI laptops sometimes want some massaging before they are willing to boot up the GRUB boot manager. Many postings show different ways to setup the boot manager. Several UEFI-capable devices can be configured
Linux Xorg -configure: Number of created screens does not match number of detected devices. Configuration failed. Configuring an Xserver used to be a task that required fiddling with the X server configuration files, and you needed to perform this every time you set up a new system. Today, the
GitLab: The project you were looking for could not be found. After setting up my first repository on my GitLab instance, I received the following error message when pushing to my first repo: remote: GitLab: The project you were looking for could not be
Enabling Serial Console Serial console output can be generated for grub messsages, for the kernel boot process, and the access to the system. Different configuration changes need to be done in order to do that. Grub
Gentoo CIFS Most Linux distributions provide their pre-compiled kernels with most options enabled as kernel modules. When self-compiling the kernel, you sometimes miss modules because you did not care to enable all available modules. That
Linux Hibernate/Suspend with Nvidia Drivers on Gentoo The proprietary Nvidia drivers from x11-drivers/nvidia-drivers contain the closed-sources drivers from Nvidia for Linux. On my laptop, the current version show problems when hibernating/suspending. Several people found that the resume operations
Raspberry Pi Silent startup failure for MongoDB on Raspberry Pi (and other systems) Yesterday I tried to install mongodb on my Raspberry Pi. Raspbian Jessie ships with a default mongo 2.4 package, so the installation should be pretty straightforward: apt-get install mongodb However, after the
Python ELPY Cheat Sheet ELPY is a python programming environment. The features are documented here. The following table summarises the default key bindings for the functions of version 1.11.0: Key Binding Function C-down Forward one
Python Python PIP Package Updates on Mac OS X Updating all python packages that are installed via pip is often referred to as running something like the commands pip freeze --local | grep -v '^\-e' | cut -d = -f 1 | xargs -n1 pip
Apple PEP8 for vim using flake8 In order to auto format your python code according to the guidelines defined by PEP8, you can use some sane default for editing python files and flake8 to check and fix possible errors
Raspberry Pi Mount SD Cards within VirtualBox on Mac OS X Sometimes you need to mount your SD cards inside a VirtualBox machine to work with the files on the card. Working with the Raspberry Pi SD card on Mac OS X is an
Ghost Blogging: Move from SQLite to Postgres or MySQL After moving to the ghost blogging platform, I started running the system with SQLite as backend. Now I wanted to move from SQLite to Postgres. A Google search brought up articles like this
nginx Redirect Parts of a Website to HTTPs with Nginx Sometimes you have certain parts of a web page that should not be accessed via HTTPs and not with clear-text HTTP. Examples for such parts of the website can be management areas of
Raspberry Pi Create a TimeMachine Backup Storage on the Raspberry Pi [TimeMachine](http://en.wikipedia.org/wiki/Time_Machine_(OS_X)) is the way to backup your data on Mac systems. The backup and restore procedure work nicely out of the box with very
Raspberry Pi Raspberry Pi: USB 3.0 Disks do not appear as device nodes The Raspberry is a nice cheap platform that can be used for many different purposes. However, the fact that it is a cheap platform means that all kinds of hardware-related problems can occur.
AVM Static IPs and DNS Names for Devices in your Home Network Devices from AVM are very popular in Germany. Several ISPs are happy to sell you a Fitz!Box device to connect your home to their network. The FRITZ!Box is a Linux-based device,
Importing old content from Blogger to Ghost My old blog was hosted on blogspot. When I decided to host this blog myself and to move to the Ghost platform, I had the need to move the old content from blogger
New Blog Location Starting from today, my blog moved from http://const-cast.blogspot.com to this new location. The blog now runs on my own infrastructure and is powered by the ghost blogging software. Google allows
FreeBSD: make config does not show config option Today was update-time for my FreeBSD machines. editors/vim required some changes to the options. However, "make config" did not open the usual config dialog. The config dialog requires ports-mgmt/dialog4ports
Setting up Flow-Inspector on Your System Some time ago, our group at TUM created a web frontend that allows users to visualize network flow data. It's based on Javascript and employs the D3Js library, which allows for dynamic rendering
tftp-hpa setup instructions on mac Just for backup purposes as I need this tftp server only on-demand: Setup Instructions NOTE: By default, tftp-hpa listens to the tftp port specified in /etc/services (port 69) on all local addresses.
cpufreq on debian lenny First, check whether you already have cpu frequency scaling enabled by running cpufreq-info: ` cpufreq-info cpufrequtils 004: cpufreq-info (C) Dominik Brodowski 2004-2006 Report errors and bugs to cpufreq@lists.linux.org.uk, please. analyzing
XCode: 1 source file parsed, no classes found or changed The XCode Cocoa Application Tutorial states that one has to create a controller class (ConverterController in this tutorial). This controller needs to be included into the Interface Builder (IB) by "Open->
New Window, New Frame Create a new window with emacs: C-x 4 b Close the window: C-x 4 0 New frames can be created with C-x 5 b ...