ha7ilm

Custom battery module for polybar

I made this hack as the built-in battery module failed to display the battery status correctly after waking up from suspend.

[module/custom-battery]
type = custom/script
exec = acpi -b | cut -d' ' -f3-5 | sed 's/Unknown/Charging/g' | sed 's/^/  /'
tail = true
interval = 30

ha7ilm

How to make formulas appear larger in Jupyter notebooks? Just add \Large to the beginning of the formula block.

E.g. $\Large \sigma$

ha7ilm

evdev:atkbd:dmi:bvn*:bvr*:bd*:svnHewlett-Packard*:pn*:pvr*
evdev:atkbd:dmi:bvn*:bvr*:bd*:svnHP*:pn*:pvr*
 KEYBOARD_KEY_a0=mute
 KEYBOARD_KEY_ae=volumedown
 KEYBOARD_KEY_b0=volumeup
 KEYBOARD_KEY_90=previoussong
 KEYBOARD_KEY_99=nextsong
 KEYBOARD_KEY_a2=playpause
 KEYBOARD_KEY_81=f20

ha7ilm

% Copyright 2019 Andras Retzler <randras@sdr.hu>
%
% Permission is hereby granted, free of charge, to any person obtaining a copy of this software 
% and associated documentation files (the "Software"), to deal in the Software without restriction, 
% including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense,
%and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so,
% subject to the following conditions:
%
% The above copyright notice and this permission notice shall be included in all copies or substantial 
% portions of the Software.

ha7ilm

def xxd(d): return reduce(lambda x,y:x+y+" ", map(lambda p:("0" if ord(p)<=0xf else "")+hex(ord(p))[2:],d), "")
    
print xxd("cat")
print xxd("\x0f\x05\x01")

This code sample was made by Andras Retzler, and is released under the MIT license.

ha7ilm

JBL E55BT

I had a problem with my new bluetooth headphones JBL E55BT.

When connected to my Linux PC, there was an unacceptable background noise and I could hear the audio driver switch on and off even during silent periods inside music.

Solution: The headphones have a separate volume control, which can be adjusted with the buttons on the device. (This is not connected to the mixer volume on the PC.) By default, that was adjusted to maximum for some reason. Turning it down and adjusting a higher volume with Pulseaudio helped to reduce the noise to an acceptable level.

ha7ilm

Match whole word in Google Docs search & replace

To match all the asdf enable regexp and type this in the search box: \basdf\b

ha7ilm

#This is based on: https://github.com/ranger/ranger/blob/master/examples/bash_automatic_cd.sh
#Paste this into your .zshrc:

function ranger-cd {
    tempfile="$(mktemp -t tmp.XXXXXX)"
    /usr/bin/ranger --choosedir="$tempfile" "${@:-$(pwd)}"
    test -f "$tempfile" &&
    if [ "$(cat -- "$tempfile")" != "$(echo -n `pwd`)" ]; then
        cd -- "$(cat "$tempfile")"
    fi  

ha7ilm

How to open a Stylus Labs Write .svgz file with Inkscape?

cat something.svgz | gunzip | inkscape -

ha7ilm

Building Inkscape from source on Ubuntu 20.04.2 LTS

sudo apt install libdouble-conversion-dev libpotrace-dev libgtkmm-3.0-dev libpoppler-dev libpoppler-private-dev libpoppler-glib-dev
git clone https://gitlab.com/inkscape/inkscape/
cd inkscape
mkdir build
cd build
cmake -DCMAKE_INSTALL_PREFIX=/home/$USER/a_sensible_install_directory/inkscape_install ..
make -j6