Linux

mount a smb-share (not via fstab!)

Written by marcelpetrick on October 7, 2016

Don’t know how often I did this on several systems and still always(!) have to pick the parameters.

$ sudo apt-fast install samba samba-common smbclient cifs-utils
$ mkdir freigabeATminipc
$ sudo mount -t cifs -o user=guest //MINIPC/freigabe freigabeATminipc/

$ sudo apt-fast install samba samba-common smbclient cifs-utils

$ mkdir freigabeATminipc

$ sudo mount -t cifs -o user=guest //MINIPC/freigabe freigabeATminipc/

Check for available shares in the network via “smbtree”.

“If Microsoft ever does applications for Linux it means I’ve won.”

Written by marcelpetrick on September 23, 2016

~ Linus Torvalds

I’ve given Visual Studio Code for Linux as prebuilt rpm-package a try. I don’t know what I expected ten minutes ago, but I am definitely under-whelmed! Another editor with syntax-highlighting, code-completion, integrated git-support and the ability to add “extensions” for all kinds of stuff. But: do I miss the trick or how do I start build binaries? (edith: possible via some “we need another build-configuration-system..”-JSON).

OK, it was fun to test, but now back to my favorite IDE* 😉 gedit & gcc on the terminal can do the same, so I don’t see any reason to use VS Code. Maybe for Go or one of the other languages, but not C++.

*QtCreator

screencast @ Linux: byzanz

Written by marcelpetrick on September 18, 2016

Wanted to illustrate an annoying fact by a short animated clip.
byzanz is the tool to go. And this guy describes how to install and use it via a small helper-script.

apt-fast as multi-connection drop-in-replacement for apt-get

Written by marcelpetrick on September 14, 2016

how to install
edit “$ sudo gedit /etc/apt-fast.conf” in line “DOWNLOADBEFORE=true” to get rid of the annoying question-dialog (if you intend to use apt-fast, you don’t care about pre-loading stuff ..)
how to use: $ sudo apt-fast update && sudo apt-fast dist-upgrade

Not much more to add. Can’t wait for a full reinstall and then testing apt-fast with the whole distributio-update. Use it now for month – updating has never been faster. Poor OSX- and Windows-users ..

aseprite: how to build @ Linux

Written by marcelpetrick on August 31, 2016

What should i say? I was searching for a more sophisticated GIF-editor to create more smooth animation-loops. Then I saw aseprite. Binaries require “donation”, so why not build it yourself since it is OSS? Sadly there were no clear official hints on how to build on Linux.
Turns out this guide is giving the correct directions:

cmake .. -G "Unix Makefiles"
make -j 3

1 2	cmake .. -G "Unix Makefiles" make -j 3

pro tip of the day: disable the suspend-keyboard-button

Written by marcelpetrick on July 4, 2016

Seriously, I have no idea why something like this has a reason to exist on a keyboard. Also those buttons for opening the browser and calculator and whatever.
Problem: I share the flat with two cats. Cats are cats. Cats don’t care where they step or lie.
Solution for Linx Mint 17.3 MATE:

$ sudo apt-get install dconf-editor
find “button-suspend” (hierarchy: org > settings-daemon > power)
set it to “nothing”; done!

Small advice: netdata

Written by marcelpetrick on May 11, 2016

It will be quite seldom that I suggest to use certain programs (or Neudeutsch: ‘apps’), but this one blew my mind, because its resource-usage is quite frugal, is “just running if started (and needed)”, has some nice views and incorporates sensor-data: netdata!

Data is displayed via http://localhost:19999/ in your local browser 😉

Sounds from the underground

Written by marcelpetrick on May 7, 2016

Found a one-liner which uses input from urandom to create music. And: I’ve experienced worse musical accentuation in games xD

cat /dev/urandom | hexdump -v -e '/1 "%u\n"' | awk '{ split("0,2,4,5,7,9,11,12",a,","); for (i = 0; i < 1; i+= 0.0001) printf("%08X\n", 100*sin(1382*exp((a[$1 % 8]/12)*log(2))*i)) }' | xxd -r -p | aplay -c 2 -f S32_LE -r 16000

1	cat /dev/urandom \| hexdump -v -e '/1 "%u\n"' \| awk '{ split("0,2,4,5,7,9,11,12",a,","); for (i = 0; i < 1; i+= 0.0001) printf("%08X\n", 100sin(1382exp((a[$1 % 8]/12)log(2))i)) }' \| xxd -r -p \| aplay -c 2 -f S32_LE -r 16000

Original source is that blog. Also offers explanations and how to tune the scale. Great!

What to do with spare 2 TB-drives?

Written by marcelpetrick on May 7, 2016

Let’s prevent that this blog turns into pure rants and finalize some articles which were (almost) finished for weeks.
I had a spare 2 TiByte 3.5″-SATA-drive from the NAS (replaced with 4 TiByte each), but did not want to use it in my PC. Why? An SSD with 128 GiByte is enough. I don’t want to replicate the archive.org ..
So I decided to make an Apple-fanboi happy: external drive for TimeMachine (tm!) XD

doEis.sh: convert all negatives via negfix8

Written by marcelpetrick on April 15, 2016

reason: too lazy to call the negfix8-script for each file itself. Because conversion is fast but even with an SSD writing the ~120 MiByte files takes some time. Precious time ..

#!/bin/bash

# author:	Marcel Petrick (mail@marcelpetrick.it)
# date:		20160415
# license:	GNU General Public License, version 2 ( http://www.gnu.org/licenses/old-licenses/gpl-2.0.en.html )

echo "############################ start of the script ############################"

#handle the issue with filenames with spaces
SAVEIFS=$IFS
IFS=$(echo -en "\n\b")

#needed for the call of negfix8
SKRIPTDIR=$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )

ALLFILES=`ls *.tif` #get all files inside the current folder which fit by suffix

WORKINGDIR="negfix8Output"
#todo: maybe add a check if the directory already existed ..
mkdir $WORKINGDIR

for FILE in $ALLFILES
do
	CLEANEDNAME="${FILE// /_}" #also alter the original-input-name by replacing all spaces
	echo "will work now on #$FILE# and save as #$CLEANEDNAME#" #print current file name

	FULLPATH=$WORKINGDIR"/"$CLEANEDNAME".png"
	#convert
	/bin/bash $SKRIPTDIR/negfix8.sh -cs $FILE $FULLPATH
done

printf "############################ end of the script ############################\n"

#!/bin/bash

# author: Marcel Petrick (mail@marcelpetrick.it)

# date: 20160415

# license: GNU General Public License, version 2 ( http://www.gnu.org/licenses/old-licenses/gpl-2.0.en.html )

echo "############################ start of the script ############################"

#handle the issue with filenames with spaces

SAVEIFS=$IFS

IFS=$(echo -en "\n\b")

#needed for the call of negfix8

SKRIPTDIR=$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )

ALLFILES=`ls *.tif` #get all files inside the current folder which fit by suffix

WORKINGDIR="negfix8Output"

#todo: maybe add a check if the directory already existed ..

mkdir $WORKINGDIR

for FILE in $ALLFILES

CLEANEDNAME="${FILE// /_}" #also alter the original-input-name by replacing all spaces

echo "will work now on #$FILE# and save as #$CLEANEDNAME#" #print current file name

FULLPATH=$WORKINGDIR"/"$CLEANEDNAME".png"

#convert

/bin/bash $SKRIPTDIR/negfix8.sh -cs $FILE $FULLPATH

done

printf "############################ end of the script ############################\n"

ps. ‘do eis’ is latin, not some german-english mumble jumble.