## VPN in der Deutschen Bahn

Es [gibt einige Probleme, im WiFi der Deutschen Bahn im ICE ein VPN zu verwenden](https://community.bahn.de/questions/1197692-nutzung-wifionice-ssl-vpn), und das ist natürlich ein Problem, weil es sich dabei um ein offenes und unverschlüsseltes Netz handelt. Die Bahn erklärt das Problem dadurch, dass Mobilfunk aktuell nur Pakete durch lässt, die maximal 1500 Byte groß sind. Da noch Platz für deren Header bleiben muss, sollte man die MTU auf 1440 setzen. Unter Windows macht man das wie folgt: Click!

## Code Rust in Windows

I have started to [learn](http://rustbyexample.com/) [rust](http://rust-lang.org), and I am enjoying myself. This is a merge and update on the two fantastic blog posts on [how to setup Visual Studio Code for Rust](https://mobiarch.wordpress.com/2015/06/16/rust-using-visual-studio-code/) and [how to enable debugging](https://sherryummen.in/2016/09/02/debugging-rust-on-windows-using-visual-studio-code/). In my personal opinion, from among [all the available IDE solutions for rust](https://areweideyet.com/), this is the best. Do you want to know more?

## Monitor WordPress Updates with Zabbix

Just another quick Zabbix related post: Since WordPress is known to be a remote shell with the extra feature of being a web blog1, it is a good idea, to at least keep your WordPress installations up-to-date. In the currently ongoing effort to replace myself with a more or less clever collection of servers, VMs and shell scripts, I decided to use Zabbix to track the most recent WordPress version and get notifications, when it changes. If you want to do the same, keep reading!
1. http://www.bash.org/?949214 []

## Zabbix 3.0 agent on FreeBSD

As you may have noticed: the folk at this blog recently started to play around with FreeBSD (mainly as FreeNAS jails). And since I recently started to <3 Zabbix. Here is an explanation on how to compile and use the agent on such a jail. Do you want to know more?

## monit – make broken things work

I set up monit, a utility for monitoring services on a Unix system. My concrete use case is a FreeBSD machine, that runs "N2N Edge", a Peer-to-peer (P2P) virtual private network (VPN) software. monit pretty much automates the "have you tried turning it off and on again?" process. Configurations like the following illustrate this:
check process myproc
matching "myproc"
start program = "/etc/init.d/myprocstart"
stop program = "/usr/bin/killall myproc"
if cpu usage > 95% for 10 cycles then restart

Do you want to know more?

## LaTeX Übungsschein Vorlage

Ich habe1 nach etwa einer Stunde die Suche nach einer LaTeX Vorlage für Übungsscheine erfolglos abgebrochen und eine eigene entworfen. Um dem einen oder anderen wissenschaftlichen Mitarbeiter das Leben zu erleichtern ist hier das Ergebnis meiner Mühen. Das ist jetzt natürlich auf die TU Berlin zugeschnitten und verwendet deswegen auch das offizielle TU Berlin Logo, aber es sollte keine große Schwierigkeit darstellen, es an die eigenen Bedürfnisse anzupassen. Die Verwendung sollte recht selbsterklärend sein. Es druckt pro DIN-A4 Seite zwei Übungsscheine. Wenn die Seite exakt in der Mitte geteilt wird, sollten die Seitenränder passen und in etwa 7mm betragen. In meinen Tests ist das Ergebnis jedenfalls passabel und muss abgesehen vom Trennschnit auf A5 nicht weiter zugeschnitten werden.
1. This post is in German and I am not sure if this is even internationally relevant. []

## Adobe Customization Wizard

I recently noticed that RdrCEF.exe was clocking close to all of my CPU cycles. This is a cloud service built into Adobe Reader DC, which [constantly sends all kinds of information to Amazon](https://forums.adobe.com/thread/1811609). Leaving all the privacy concerns aside, my computer became inoperable by opening a PDF document. Okay, here's how you fix this. * Download the [Adobe Wizard](http://www.adobe.com/devnet-docs/acrobatetk/tools/Wizard/), most likely [the version for Adobe DC](http://www.adobe.com/devnet-docs/acrobatetk/tools/Wizard/WizardDC/basics.html). * Put on your robe and your wizard hat. * Get yourself your preferred [Adobe DC Installer](ftp://ftp.adobe.com/pub/adobe/reader/win/AcrobatDC/1500720033/), and **make sure it's the MSI version**. * Use the Wizard to open the MSI and do this: [![Adobe Wizard Removes Cloud Services](/wp-content/uploads/2016/09/wizard-300x213.png)](/wp-content/uploads/2016/09/wizard.png) * Save the MSI and install your new AdobeDC. Of course, feel free to customize your AdobeDC installer in any other way.

## TaskWarrior on Android

TaskWarrior is my tool of choice to manage my list of next actions. I like it because the data is as open as it can be: it is stored as plain-text, there are many different tools to access it and TaskWarrior itself is open source. To access the same data on different devices, an easy solution is, to just copy the TaskWarrior database over to the other devices. Software like OwnCloud, Dropbox or Super Flexible File Synchronizer (this is not a recommendation) can help automate the process. With the configuration variable data.location one can control, which folder TaskWarrior uses to read and write the data and as long as you don't go crazy and execute TaskWarrior faster then you sync, everything works quite well (in case you end up with conflicts you could always use the merge command and hope for the best). A very important use case, that was not easy to cover with this was my smartphone: My solution always was, to SSH to a server, where TaskWarrior is installed and use it there. But since I seem to be one of very very few people in the world, that would prefer a hardware QWERTY keyboard on their smartphone, there are no decent options, that make SSH user friendly enough to use it on a daily basis (yes, I tried stuff like this but quickly ran out of hands to handle it on the bus). Do you want to know more?

## Readable Git Annex Unused

So unless you know and use [git annex](https://git-annex.branchable.com/), this is not going to be very useful for you. Check it out, though. It's pretty cool. Unless you are on Windows. In that case it's hell. Anyway, I wrote a script to help me figure out the output of [git annex unused](http://manpages.ubuntu.com/manpages/wily/man1/git-annex-unused.1.html). In short, it tells you what those files used to be called before you lost them. Script:
#!/usr/local/bin/python3.5
import re, sys, os
from subprocess import Popen,PIPE
FNULL = open(os.devnull, 'w')

def seeker(s):
process = Popen(["git", "log", "--stat", "-S", s], stderr=FNULL, stdout=PIPE)
match = re.search(r"(([ -~]*\/)*[ -~]*)\|", log)
if not match: return ''
else: return match.group(1).strip()

if len(sys.argv)>1:
print( seeker(sys.argv[1]) )
else:
clist = []
while True:
crawl = input().strip()
if not crawl: break
crawl = crawl.split()
clist.append(crawl)
for x in clist:
print('%s : %s' % ( x[0], seeker(x[1]) ) )

You can either call it with one argument which should be a key, or if you call it with no argument, it expects you to paste the list of results you got from git annex unused into stdin. It then goes through the list and tells you the corresponding filename for each key. This script is phenomenally stupid in that it does quite a terrible regular expression search on the output of git log and returns the first match it finds. Sue me, it works pretty well at my end.

## Batch edit your PuTTY Sessions

The color that [PuTTY](http://www.putty.org/) uses for blue is simply too dark. The scrollback buffer, by default, is 200 lines. That's ridiculous, I have several gigabytes of RAM going to waste here. In case you have a lot of stored sessions, it's quite tiresome to use PuTTY to go through all of them and fix whatever settings you would like to change. You can edit them directly in the registry, though - or use this Python 3 script!
from winreg import OpenKey, EnumKey, QueryValueEx, SetValueEx, \
KEY_WRITE, KEY_READ, HKEY_CURRENT_USER as HKCU

class callrange:
def __init__(self, call_function):
self.call = call_function
def __getitem__(self,index):
try: return self.call(index)
except OSError: raise IndexError

with OpenKey(HKCU,"SOFTWARE\SimonTatham\PuTTY\Sessions") as sessions:
for s in callrange(lambda i: EnumKey(sessions,i)):
with OpenKey(sessions,s,access=KEY_WRITE|KEY_READ) as key:
for name,value in [
('Colour14','100,100,250'),
('Colour15','120,120,250'),
('TerminalType','xterm'),
('ScrollbackLines',6000)
]:
type = QueryValueEx(key,name)[1]
SetValueEx(key,name,0,type,value)

By the way, searching the tubes reveals [some useful suggestions to improve PuTTY's default settings](http://dag.wiee.rs/blog/content/improving-putty-settings-on-windows).

## Finally get rid of Camera Roll

Ever since I started using Windows 10, it has been creating folders called "Camera Roll" and "Saved Pictures" in the "My Pictures" folder. It was the last straw. Applications had been creating subdirectories in the "My Documents" folder for ages now. Not again. The line must be drawn here. This far, no further. And I will make them pay for what they've done! Do you want to know more?

## Install N2N as a Service on FreeBSD

Why do I want to? Because I run the incredibly awesome [FreeNAS](http://www.freenas.org/) on a small server, and the jails are FreeBSD. One of those jails is supposed to be a in an N2N VPN, so I can access the files from elsewhere. Do you want to know more?

## Disable the Windows 8 / 10 lock screen

Are you also annoyed with the Windows lock screen? You know, the one you must swipe or click away before you can enter your login data. The one that doesn't even respond to shift anymore since Windows 10. It can be disabled as follows: * Open the Group Policy Editor. Either 1. press Win+R and run gpedit or, if you don't have gpedit.msc, 2. open the Microsoft Management Console by pressing Win+R and entering mmc. Go to FileAdd/Remove Snap-In, select the Group Policy Object Editor, press Add, Finish and OK. Expand the Local Computer Policy. * Navigate to 3. Computer Configuration 4. Administrative Templates 5. Control Panel 6. Personalization, edit Do not display the lock screen and set it to Enabled.