Kategorie: TechTalk

Nerdzeug, Computer, Technik, Rocket Science

Installing Brother DCP Scanner Drivers in Ubuntu

Veröffentlicht von Florian Panzer am 29. August 2018

Start a Terminal using CTRL+ALT+T. Install some depencencies and frontend scanner tools using

sudo apt-get install xsane sane-utils simple-scan lib32stdc++6

Now download the drivers. In case brother loses them, I mirrored them here. Alternatively use the wget commands down below.

brother-scanner-drivers-rephlex-de Download

wget http://download.brother.com/welcome/dlf006646/brscan4-0.4.4-4.i386.deb -O brscan4-0.4.4-4.i386.deb
wget http://download.brother.com/welcome/dlf006651/brscan-skey-0.2.4-1.i386.deb -O brscan-skey-0.2.4-1.i386.deb
wget http://download.brother.com/welcome/dlf006654/brother-udev-rule-type1-1.0.2-0.all.deb -O brother-udev-rule-type1-1.0.2-0.all.deb

Now install the drivers you just downloaded:

sudo dpkg -i –force-architecture brscan.deb brother-udev-rule.deb

And restart your udev service:

sudo systemctl restart udev.service

All i had to do was unplug and plug in my DCP, and i could immediately scan using simple-scan in Gnome.

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Asus ZenBook 13 (UX331UN) with Ubuntu: Battery drain while in suspend

Veröffentlicht von Florian Panzer am 21. August 2018

When i got my shiny new ZenBook 13 UX331UN in July, i immediately wiped it and installed Ubuntu 18.04 (Bionic Beaver).

But I soon realized something was wrong with suspend: The laptop would go to sleep and over night the battery would either almost (10-ish percent) or completely drain, leaving the laptop completely powered off.

On other laptops the suspend state would eat about 5% charge per day, leaving you able to suspend around 3 weeks in theory, but something was using the battery in suspend here.

Here's the problem analysis:

Suspend your laptop. Wake it up again. Now check the output of

sudo journalctl | grep "PM: suspend" | tail -2

May 13 18:41:00 mex kernel: PM: suspend entry (s2idle)
May 13 20:52:36 mex kernel: PM: suspend exit

If you end up with

Your laptop is only entering "s2idle" sleep (which is basicallynot saving much more than with blanking out screen and disabling the network). What we really want instead is the "deep" sleep.

You can also check

cat /sys/power/mem_sleep

which yields

[ s2idle] deep

meaning the s2idle state is active in standby, because it's written in brackets.

The permanent fix:

Edit your grub bootloader config to add a parameter to your Linux kernel when it boots. Type

sudo gedit /etc/default/grub

and replace the line GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" with

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash mem_sleep_default=deep"

Save the file and exit. Now run

sudo update-grub && sudo reboot

To apply the changes and reboot. Test. Done.

IMPORTANT: If you now have troble waking your laptop up, DO NOT USE THE NVIDIA DRIVERS. They suck. Use noveau.

EDIT: The above works and is tested, but i now have the problem that the laptop won't resume when on battery. When it's on power supply it can resume. Any ideas!?

EDIT: You're not alone: https://bugzilla.kernel.org/show_bug.cgi?id=201307 and https://askubuntu.com/questions/1071855/ubuntu-18-04-does-not-wake-up-from-suspend-on-asus-zenbook

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Proxmox: " perl: warning: Setting locale failed."

Veröffentlicht von Florian Panzer am 13. Juli 2018

If you run Proxmox and run into

perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "en_US.utf8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").

here's your solution:

export LANGUAGE=en_US.UTF-8
export LANG=en_US.UTF-8
export LC_ALL=en_US.UTF-8
locale-gen en_US.UTF-8
dpkg-reconfigure locales -u

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Ubuntu: Installing Adapta-Eta GTK Theme and Paper Icon-/Cursor-Theme

Veröffentlicht von Florian Panzer am 12. Juli 2018

# adapta-eta gtk theme
sudo apt-add-repository ppa:tista/adapta
sudo apt-get update && sudo apt-get install adapta-gtk-theme
# paper icon / cursor theme
sudo add-apt-repository -u ppa:snwh/ppa
sudo apt-get install paper-icon-theme

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Fix for "Internal Server Error" on Scheduled Tasks in Spacewalk 2.6 / 2.7 / 2.8

Veröffentlicht von Florian Panzer am 10. Juli 2018

Add this to /etc/rhn/rhn.conf:

hibernate.enable_lazy_load_no_trans=true

Then restart spacewalk services like so:

systemctl stop tomcat
systemctl stop taskomatic
systemctl stop rhn-search
systemctl start rhn-search
systemctl start taskomatic
systemctl start tomcat
spacewalk-service restart

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my PS1

Veröffentlicht von Florian Panzer am 10. Juli 2018

export PS1="\[\033[38;5;11m\]\u\[$(tput sgr0)\]\[\033[38;5;15m\]@\h:\[$(tput sgr0)\]\[\033[38;5;6m\][\w]:\[$(tput sgr0)\]\[\033[38;5;15m\] \[$(tput sgr0)\]"

and it looks like this:

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BMW

Veröffentlicht von Florian Panzer am 5. Juni 2018

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Spacewalk Client for Ubuntu 18.04 / bionic

Veröffentlicht von Florian Panzer am 2. Mai 2018

You have to roll your own:

for shizzle in \
bionic/apt-spacewalk \
bionic/python-ethtool \
bionic/rhn-client-tools \
bionic/rhnlib \
bionic/rhnsd \
; do
cd $shizzle && debuild -uc -us ; \
cd ../../
done

I uploaded some binary packages (.deb) which work for me ™:

spacewalk-client-bionic.zip

(This was originally uploaded for https://www.redhat.com/archives/spacewalk-list/2018-May/msg00009.html )

EDIT: If you are missing dependencies, use packages from artful

https://launchpad.net/ubuntu/artful/amd64/apt-transport-spacewalk

https://launchpad.net/ubuntu/artful/amd64/python-gudev

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Exchange MoveRequest – REALLY FAST, ignore "stalled due to disk latency"

Veröffentlicht von Florian Panzer am 19. April 2018

If you want to ignore Exchange stalling on your moverequest slow source/destination servers:

Get-MailboxDatabase "ex2013-db01" | Get-Mailbox | select -first 5 | New-MoveRequest -TargetDatabase ex2016-db01 -BatchName gna -Priority Highest

Monitor with:

get-moverequest | get-moverequeststatistics

When they're all Completed, cleanup

get-moverequest | remove-moverequest

Then repeat from step 1.

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Just finished building firefox on LFS ;-)

Veröffentlicht von Florian Panzer am 18. April 2018

Just showing this off…

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How to connect Nextcloud to Active Directory using AD FS (without losing your mind)

Veröffentlicht von Florian Panzer am 5. April 2018

Disclaimer:

This article is LONG. What you're about to do is complicated.
Read the stuff between the screenshots. It's mostly commented screenshots, really.
Works for me ™. If it does not work for you, drop me an email or add a comment down below. I'll answer within minutes, usually.
I can't be blamed.
I can't be sued.
Use your brain. Try not to loose it, though.
I was lazy when i wrote this, so you have GERMAN screenshots and ENGLISH text. Come on, you can do it. Usually I do it the other way around all day trying to translate Microsoft-English to sane German. You can figure stuff out by looking at the screenshots i guess. Just think Weißwurst and Sauerkraut.

This walkthrough is provided as a complete lab, that means i'lll be installing Windows, Linux, Installing an AD, a webserver and all of that stuff. If you already have that infrastructure in place (or bits & pieces of it), just skip the corresponding parts.

Here's the table of contents:

1. Install Windows
2. Set up Active Directory
3. Install Linux
4. Install Apache + MariaDB
5. Install Nextcloud
6. Install the Nextcloud SAML / SSO Plugin
7. DoNutS & SSaLt
8. Install Install AD FS
9. Configure AD FS
10. Configure Nextcloud for AD FS Authentication

Step 1: Install Windows

Duh. obviously. I use Windows Server 2016, you might use a different version on your own risk, or you already have it in place, whatever.

Step 2: Set up Active Directory

So you need at least one domain contoller running, obviously. Just for this example lab, i'll set one up named dc01.testdomain.local.

Head over to the Server Manager, add the "Active Directory Domain Services" Role, install it and configure your domain, then reboot. You should have a working Acrive Directory with one domain now. Just for reference i added some screenshots here, in case this REALLY is your first time setting up a domain. Good luck, in that case… 🙂

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Example Netplan dual stack network configuration for Ubuntu 18.04

Veröffentlicht von Florian Panzer am 5. April 2018

(08-15 example) srv01 ~ # cat /etc/netplan/01-netcfg.yaml 
# This file describes the network interfaces available on your system
# For more information, see netplan(5).
network:
  version: 2
  renderer: networkd
  ethernets:
    ens160:
      addresses: [1.2.3.4/30, "2a02:708:xx:xx::2/64"]
      gateway4: 1.2.3.4
      gateway6: 2a02:708:xx:xx::1
      nameservers: 
        addresses: [8.8.8.8, "2001:4860:4860::8888"]
    ens192:
      addresses: [192.168.0.10/24]


to apply the settings, use

netplan apply

to list your network interfaces (and their names) use

ip addr

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DisplayLink-Driver / i-teck Docking Station Driver for Debian and Ubuntu

Veröffentlicht von Florian Panzer am 13. März 2018

Long story short:

https://raw.githubusercontent.com/AdnanHodzic/displaylink-debian/master/displaylink-debian.sh

local mirror here (dated 2018/03/13)

See it in Action:

root@nb-fpanzer:~# ./displaylink-debian.sh
————————— displaylink-debian —————————-
DisplayLink driver installer for Debian based Linux distributions:
* Debian GNU/Linux
* Ubuntu
* Elementary OS
* Linux Mint
* Kali Linux
* Deepin
Options:
[I]nstall
[U]ninstall
[R]e-install
[Q]uit
Select a key: [i/u/r/q]: I
——————————————————————-
Checking dependencies
unzip is installed
linux-headers-4.15.0-10-generic is installed
dkms is installed
lsb-release is installed
dpkg-query: Paket »linux-source« ist nicht installiert und es ist keine Information verfügbar
Verwenden Sie dpkg –info (= dpkg-deb –info) zum Untersuchen von Archiven
und dpkg –contents (= dpkg-deb –contents) zum Auflisten ihres Inhalts.
linux-source not found! Install? [Y/n] Y
Paketlisten werden gelesen… Fertig
Abhängigkeitsbaum wird aufgebaut.
Statusinformationen werden eingelesen…. Fertig
Die folgenden zusätzlichen Pakete werden installiert:
linux-source-4.15.0
Vorgeschlagene Pakete:
libncurses-dev | ncurses-dev kernel-package libqt3-dev
Die folgenden NEUEN Pakete werden installiert:
linux-source linux-source-4.15.0
0 aktualisiert, 2 neu installiert, 0 zu entfernen und 0 nicht aktualisiert.
Es müssen 129 MB an Archiven heruntergeladen werden.
Nach dieser Operation werden 144 MB Plattenplatz zusätzlich benutzt.
Möchten Sie fortfahren? [J/n] J
Holen:1 http://de.archive.ubuntu.com/ubuntu bionic/main amd64 linux-source-4.15.0 all 4.15.0-10.11 [129 MB]
Holen:2 http://de.archive.ubuntu.com/ubuntu bionic/main amd64 linux-source all 4.15.0.10.11 [2.272 B]
Es wurden 129 MB in 30 s geholt (4.278 kB/s).
Vormals nicht ausgewähltes Paket linux-source-4.15.0 wird gewählt.
(Lese Datenbank … 288228 Dateien und Verzeichnisse sind derzeit installiert.)
Vorbereitung zum Entpacken von …/linux-source-4.15.0_4.15.0-10.11_all.deb …
Entpacken von linux-source-4.15.0 (4.15.0-10.11) …
Vormals nicht ausgewähltes Paket linux-source wird gewählt.
Vorbereitung zum Entpacken von …/linux-source_4.15.0.10.11_all.deb …
Entpacken von linux-source (4.15.0.10.11) …
linux-source-4.15.0 (4.15.0-10.11) wird eingerichtet …
linux-source (4.15.0.10.11) wird eingerichtet …
Platform requirements satisfied, proceeding …
——————————————————————-
Please read the Software License Agreement
available at http://www.displaylink.com/downloads/file?id=1123
and accept here: [Y]es or [N]o: Y
Downloading DisplayLink Ubuntu driver:
–2018-03-13 15:55:17– http://www.displaylink.com/downloads/file?id=1123
Auflösen des Hostnamens www.displaylink.com (www.displaylink.com)… 54.229.186.74, 52.208.143.240, 34.252.223.12, …
Verbindungsaufbau zu www.displaylink.com (www.displaylink.com)|54.229.186.74|:80 … verbunden.
HTTP-Anforderung gesendet, auf Antwort wird gewartet … 303 See Other
Platz: http://assets.displaylink.com/live/downloads/software/f1123_DisplayLink%20USB%20Graphics%20Software%20for%20Ubuntu%204.2.zip?AWSAccessKeyId=AKIAJHGQWPVXWHEDJUEA&Expires=1520953530&Signature=NCBPWabnNZOkbSctW5sv5a4ksAE%3D [folgend]
–2018-03-13 15:55:17– http://assets.displaylink.com/live/downloads/software/f1123_DisplayLink%20USB%20Graphics%20Software%20for%20Ubuntu%204.2.zip?AWSAccessKeyId=AKIAJHGQWPVXWHEDJUEA&Expires=1520953530&Signature=NCBPWabnNZOkbSctW5sv5a4ksAE%3D
Auflösen des Hostnamens assets.displaylink.com (assets.displaylink.com)… 54.231.141.36
Verbindungsaufbau zu assets.displaylink.com (assets.displaylink.com)|54.231.141.36|:80 … verbunden.
HTTP-Anforderung gesendet, auf Antwort wird gewartet … 200 OK
Länge: 14112877 (13M) [application/octet-stream]
Wird in »DisplayLink_Ubuntu_4.2.zip« gespeichert.
DisplayLink_Ubuntu_4.2.zip 100%[===================================================================================================================================>] 13,46M 3,70MB/s in 3,7s
2018-03-13 15:55:21 (3,62 MB/s) – »DisplayLink_Ubuntu_4.2.zip« gespeichert [14112877/14112877]
——————————————————————-
Preparing for install
Archive: DisplayLink_Ubuntu_4.2.zip
inflating: 4.2/displaylink-driver-4.2.29.run
inflating: 4.2/LICENSE
creating: 4.2/__MACOSX/
inflating: 4.2/__MACOSX/._LICENSE
Creating directory displaylink-driver-4.2.29
Verifying archive integrity… 100% All good.
Uncompressing DisplayLink Linux Driver 4.2.29 100%
## NO suitable EVDI source found ##
——————————————————————-
Installing driver version: 4.2
DisplayLink Linux Software 4.2.29 install script called: install
Distribution discovered: Ubuntu Bionic Beaver (development branch)
Installing
Configuring EVDI DKMS module
Registering EVDI kernel module with DKMS
Building EVDI kernel module with DKMS
Installing EVDI kernel module to kernel tree
EVDI kernel module built successfully
Installing x64-ubuntu-1604/DisplayLinkManager
Installing libraries
Installing firmware packages
Installing licence file
Adding udev rule for DisplayLink DL-3xxx/5xxx devices
Please read the FAQ
http://support.displaylink.com/knowledgebase/topics/103927-troubleshooting-ubuntu
——————————————————————-
Performing post install steps
Created symlink /etc/systemd/system/multi-user.target.wants/dlm.service → /lib/systemd/system/dlm.service.
——————————————————————-
Performing clean-up
Removing redundant: "DisplayLink_Ubuntu_4.2.zip" file
Removing redundant: "4.2" directory
——————————————————————-
Install complete, please reboot to apply the changes
——————————————————————-