Author Archives: admin

How to set up a basic OpenVPN bridging server

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Beside the official OpenVPN documentation there’s a vast number of howtos and guides out there, that’ll tell you how to set up an OpenVPN server. Unfortunately, most of these use a tunneling setup including some sort of router and packet filter. If you want to transport non-IP based traffic and can accept the increased broadcast overhead and poor scalability, you… Read more »

sshuttle error: File “ssubprocess.py”, line 1117, in _execute_child

If you run into this error: the culprit is simply the missing netstat program on the target host. sshuttle tries to fork a netstat process without checking if netstat is installed on the target host in the first place. On a Fedora host netstat comes with the net-tools package:

Installing EagleCad 6.5 on Fedora 19

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Installing the latest EagleCAD on Fedora 19 is a bit tricky. The Linux version requires libssl and libcrypto (which is thankfully mentioned right on the download page), unfortunately an older version which is no longer shipped by Fedora (Version 1.0.1 of openssl was released in March 2012). As a (very dirty) workaround, you can just create a symlink to the… Read more »

Mounting NFS share with autofs

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Statically mounting remote filesystems via /etc/fstab can be quite impractical on mobile devices such as notebooks that are frequently used in different network environments where the share is not always available. To take care of this, there’s a great tool called autofs that let’s you mount remote filesystems on demand. Let’s assume, there’s an NFS server running in our network… Read more »

Resolve local hostname with nss-myhostname

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Many applications rely on a fully qualified domain name and won’t work properly or even fail to start without one. For example, even if your hostname is correctly set up, apache won’t start with the default configuration on Fedora 19 if your DNS server cannot resolve the hostname: But fortunately there’s a plugin to the GNU Name Service Switch (NSS)… Read more »

Setting the hostname in Fedora 18

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Staring with Fedora 18, the hostname is longer set it /etc/sysconfig/network but in /etc/hostname. To manipulate the hostname there’s a small tool named hostnamectl which is part of Fedora’s systemd package. The following table (taken from the Fedora 18 Release Notes) shows a few basic hostnamectl commands to set or change a host’s name: See also hostnamectl manpage.

Flashing Gen7 bootloader with avrdude

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The Arudino IDE Support package also contains different bootloaders for quite a few variations of the Generation 7 Electronics RepRap controller board. The Arudino IDE Support wiki page at the RepRap wiki also contains a paragraph on how to flash the bootloader onto the Gen7 board with avrdude. It suggest to write the fuses first, the flash the hex file… Read more »