Archiv des Autors: hamster

1&1 Digital TV Senderliste ohne großen Schnickschnack

Da Senderliste von 1&1 ein Graus ist zum ausdrucken, habe ich sie mal aufgeräumt.
Vielleicht kann jemand noch was damit anfangen:
Aufgeräumte 1&1 Digital TV Senderliste zum Drucken
Update 28.08.2018:
Kaum erstellt man die abgespeckte Datei ändert sich die Senderreihenfolge.
Hier die neue Senderliste gültig ab 28.08.2018.

Hier ist das Original: https://hilfe-center.1und1.de/bin_dea/article/797115/Senderliste_SD.pdf

Install Arch on OrangePi Plus 2e

There is already a howto on how to install Arch on a Orange Pi One.
The only difference for me was to compile it with another OrangePi defconfig and toolchain with hardware float (apt-get install gcc-arm-linux-gnueabihf).
You can find the appropriate defconf for your OrangePi here.
The config for u-boot looks like:

make -j4 ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- orangepi_plus2e_defconfig
make -j4 ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf-

The only thing that didn’t work was the wifi adapter. I found an aur repository for the kernel module. It uses the same git repo as this howto.

After the restart the right kernel module was loaded and wifi worked, yeeeehaaaa 🙂
More information about the OrangePi Plus 2E.

compile a cuda program with gcc-6

If one experiences this example message while compiling:

/usr/local/cuda/include/crt/host_config.h:119:2: error: #error -- unsupported GNU version! gcc versions later than 6 are not supported!
 #error -- unsupported GNU version! gcc versions later than 6 are not supported!
  ^~~~~

Try the flag CUDA_NVCC_FLAGS and set the gcc compiler to version 6:
cmake -D CUDA_NVCC_FLAGS="-ccbin gcc-6" .. && make

awk script to remove objects from a pdf

First uncompress the pdf if it is compressed with pdftk:
pdftk myfile.pdf output unc.pdf uncompress

Then remove all objects that contain the keywords PDF-XChange|pdfxviewer.com|PDFXCViewer20|Click to buy NOW:

awk '
    BEGIN {
        found=0
    }
    {
    if ( $0 ~ /^[0-9 ]+obj/ ) {
        objectFound=1;
        objectLineCounter=0;
        objektZeilen[objectLineCounter]=$0;
        objectLineCounter++;
    } else if (objectFound == 1) {
        objektZeilen[objectLineCounter]=$0;
        if ( $0 ~ /PDF-XChange|pdfxviewer.com|PDFXCViewer20|Click to buy NOW/ ) {
            found=1;
        }
        if ( ( $0 ~ /endobj/ ) && ( found == 0 ) ) {
            for (i=0; i<length(objektZeilen); i++) {
                print objektZeilen[i];
            }
            delete objektZeilen;
            objectFound=0;
            found=0;
        }
        if ( ( $0 ~ /endobj/ ) && ( found == 1 ) ) {
            delete objektZeilen;
            objectFound=0;
            found=0;
        }
        objectLineCounter++;
    } else {
        print $0
    }
    }
' unc.pdf > test.pdf

Recompress and repair pdf with pdftk:
pdftk test.pdf output comp.pdf compress

Too bad it also removed the OCR layer. I couldn’t find out which layer is responsible for the OCR.

extract all rars in all subdirectories with find

Findet alle multipart rars in allen subdirectories von . außer dir1 und dir2 und entpackt in dem Ordner die Dateien.


find . \( -path "./dir1" -o -path "./dir2" \) -prune -o -name '*.r00' -execdir unrar x {} \;

Wenn schon Dateien vorhanden sind, die nicht überschrieben werden sollen:


find . \( -path "./_GameRetroPacks" -o -path "./_Konsol" \) -prune -o -name '*.r00' -execdir bash -c "echo E | unrar x {}" \;

Löschen aller Rardateien in allen Unterordnern:


find . -regextype posix-extended -iregex ".+\.r[0-9ar]{2}" -exec rm {} \;

Create a guest WLAN with OpenWrt

It’s enough to do it like this tutorial says:
https://wiki.openwrt.org/doc/recipes/guest-wlan-webinterface

If you want a log of the surfing history for maybe avoid being held responsibly for the things your guest does (Störerhaftung) you can log the DNS queries:
https://superuser.com/questions/632898/how-to-log-all-dns-requests-made-through-openwrt-router/897413#897413

Now you need a rsyslog server that collects those logs:
https://kimkil.nietsniehu.net/raspberry-pi-as-a-log-server-with-rsyslog-2/

Ubuntu and a custom build zfs and spl from git

I wanted to try the 0.7.0-rc3 from git. So I cloned from git and changed to the zfs and spl version 0.7.0-rc3 tag.

Since ubuntu ships with a prebuilt zfs and spl my custom packages didn’t work.
It always loaded the prebuilt zfs and spl from the kernel modules directory but not the one I built.
I figured out a way to make it work nonetheless.

– check your currently running zfs module:

# modinfo zfs
filename:       /lib/modules/4.8.0-41-generic/kernel/zfs/zfs/zfs.ko
version:        0.6.5.8-0ubuntu4.1

– remove kernel mods (make sure to have all zfs pools unmounted, otherwise it will fail):

rmmod zfs zunicode zcommon znvpair spl zavl

– remove kernel module from your current running kernel:

rm -r /lib/modules/$(uname -r)/kernel/zfs

– build deb packages for your currently running ubuntu (see their wiki):

cd $where_your_spl_from_git_resides
make clean; ./autogen.sh
cd $where_your_zfs_from_git_resides
make clean; ./autogen.sh
cd $where_your_spl_from_git_resides
./configure; make deb
for file in *.deb; do gdebi -q --non-interactive $file; done
cd $where_your_zfs_from_git_resides
./configure; make deb
for file in *.deb; do gdebi -q --non-interactive $file; done

– do a modprobe:

modprobe zfs

– check again the running zfs module:

# modinfo zfs | head -2
filename:       /lib/modules/4.8.0-41-generic/extra/zfs/zfs/zfs.ko
version:        0.7.0-rc3

After that it worked just well. I guess it has to be done for every new kernel release. If there is another better way instead of deleting modules from the kernel modules directory to make it work, please share.

PulseAudio erlaubt es nicht das Audio Ausgabegerät zu wechseln

Vielleicht liegt es am pavucontrol, dass nicht umgeschaltet werden kann. Nach ein wenig googeln findet man Kommandos, wie man die Audioausgabe über Konsole abändern kann.
pacmd move-sink-input 2 1 ging nicht. Fehler ist „Moved failed.“
Weiterer Details verrät:

hamster@hamsterkaefig:~$ pacmd list-sink-inputs
1 sink input(s) available.
    index: 2
  driver: <protocol-native.c>
  flags: DONT_MOVE START_CORKED FIX_RATE 
  state: RUNNING
  sink: 2 <alsa_output.pci-0000_00_14.2.analog-stereo>
  volume: front-left: 65536 / 100% / 0,00 dB,   front-right: 65536 / 100% / 0,00 dB
          balance 0,00
  muted: no
  current latency: 50,91 ms
  requested latency: 23,22 ms
  sample spec: float32le 2ch 44100Hz
  channel map: front-left,front-right
               Stereo
  resample method: copy
  module: 14
  client: 14 <Tropico5>
  properties:
    media.role = hex:
    phonon.streamid = hex:
    media.name = "Playback Stream"
    application.name = "Tropico5"
    native-protocol.peer = "UNIX socket client"
    native-protocol.version = "31"
    application.process.id = "30530"
    application.process.user = "hamster"
    application.process.host = "hamsterkaefig"
    application.process.binary = "Tropico5"
    window.x11.display = ":0.0"
    application.language = "de_DE.UTF-8"
    application.process.machine_id = "96177112fcaef6926d04e5b80000002e"
    application.process.session_id = "c2"
    module-stream-restore.id = "sink-input-by-application-name:Tropico5"

Dort steht bei flags: "DONT_MOVE"
Danach gegoogelt findet man die Lösung z.B. hier und hier

Man erstellt eine Datei im eigenen Home namens .alsoftrc mit Inhalt:

[pulse]
allow-moves=yes

Raspberry Pi reset wireless lan to solve problems with no connection

I found a script on http://askubuntu.com/a/593589 which tried to reset the wlan interface in various ways. I modified that script a little with and installed in on cron and let it execute each minute (*/1 * * * * /root/bin/resetWifi.sh)

resetWifi.sh:


#!/bin/bash
# program to check wifi and reset if not running
if [[ ! -z "$(ps waux | grep $0)" ]]; then exit 0; fi
exec 2>&1 1> >(tee -a $HOME/wificheck.log)
GATEWAY=192.168.1.1
IWCONFIG_BIN=$(which iwconfig)
RFKILL_BIN=$(which rfkill)
PING_BIN=$(which ping)
DEVICE=$(iwconfig 2>/dev/null | grep 802 | awk '{print $1}')
function isPingWorking {
        if ${PING_BIN} -c 1 ${GATEWAY} >/dev/null 2>&1 ; then
                exit 0
        else
                echo "didn't work :("
        fi
}
while true; do
        isPingWorking
        # Failed, try to reset wifi - sometimes works ok
        date
        ifdown ${DEVICE}
        sleep 1
        ifup ${DEVICE}
        sleep 10
        isPingWorking
        echo "turn wlan stick power off... "
        ${IWCONFIG_BIN} ${DEVICE} txpower off
        sleep 3
        ${IWCONFIG_BIN} ${DEVICE} txpower auto
        isPingWorking
        echo "use rfkill to reenable wlan stick... "
        ${RFKILL_BIN} list
        ${RFKILL_BIN} block wifi
        sleep 3
        ${RFKILL_BIN} unblock wifi
        isPingWorking
done
exit 0

Test if you have rfkill installed. The other bins should be available on most default installations.