Homelab, Linux, JS & ABAP (~˘▾˘)~
 

Category: Software

Software, Terminal

[NAS] Megarac SP Gui / IPMI

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In meinem NAS nutze ich seit vielen Jahren als Motherboard ein ASRock C2550D4I mit einer recht stromsparsamen on-Board CPU und einer BMC/IPMI Schnittstelle, welche Fernwartung über einen separaten LAN Port möglich macht.

BMC = Baseboard Management Controllers
IPMI = Intelligence Platform Management Interface

Bei einem BMC Update hat sich leider die WebGui verabschiedet und ich musste mir die Sache auf der Konsole anschauen. Dafür habe ich IPMITOOL installiert und verwendet. Dabei stellte sich heraus, dass lediglich die Netzwerkeinstellungen verloren gegangen sind.

Hier einige hilfreiche Befehle im Umgang mit dem IPMITOOL, welche mir geholfen haben. Über diesen Weg lässt sich ebenfalls das Passwort des Admin-Users zurücksetzen.

# install 
sudo apt install ipmitool

# display sensor & network settings
sudo ipmitool sensor
sudo ipmitool lan print 1

#set network settings
sudo ipmitool lan set 1 ipsrc static
sudo ipmitool lan set 1 ipaddr 192.168.178.3
sudo ipmitool lan set 1 defgw ipaddr 192.168.178.1


# Reset password
# https://support.oneidentity.com/de-de/kb/261220/reset-the-bmc-ipmi-password
sudo ipmitool user list 1
ID  Name	     Callin  Link Auth	IPMI Msg   Channel Priv Limit
1                    false   false      true       ADMINISTRATOR
2   admin            true    true       true       ADMINISTRATOR
3                    true    false      false      NO ACCESS
4                    true    false      false      NO ACCESS
5                    true    false      false      NO ACCESS
6                    true    false      false      NO ACCESS
7                    true    false      false      NO ACCESS
8                    true    false      false      NO ACCESS
9                    true    false      false      NO ACCESS
10                   true    false      false      NO ACCESS
sudo ipmitool user set password 2
Password for user 2: 
Password for user 2: 
Set User Password command successful (user 2)


# IPMI reseten
# https://www.thomas-krenn.com/de/wiki/IPMI_BMC_reset_bei_IPMI_Problemen
sudo ipmitool mc reset cold
# or remote with
ipmitool -I lanplus -H ip_address -U admin -a bmc reset cold

# Wenn das nicht hilft, ggf. hier schauen:
# https://portal.nutanix.com/page/documents/kbs/details?targetId=kA00e000000CrKRCA0
Software

[Software] Save battery power on laptops

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With TLP I was able to extend the battery life of my ThinkPad E595 significantly.

“TLP is a feature-rich command line utility for Linux, saving laptop battery power without the need to delve deeper into technical details.”
https://linrunner.de/tlp/

If you prefer tools with UI, check TLPUI: https://github.com/d4nj1/TLPUI
There is also a repository for it:

sudo add-apt-repository ppa:linuxuprising/apps
sudo apt update
sudo apt install tlpui

When using a ThinkPad, there are specific kernel modules that can be installed.
https://linrunner.de/tlp/installation/ubuntu.html#thinkpads-only

Check with tlp-stat -b

Install with:

sudo apt install acpi-call-dkms tp-smapi-dkms

Another tool to monitor your power usage is PowerTOP:

“PowerTOP is a Linux tool to diagnose issues with power consumption and power management.”
https://01.org/powertop/

Proxmox, Software, ZFS

[Proxmox] Installing Cockpit with ZFS Manager extension

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The Cockpit ZFS Manager requires Cockpit version 201 or above. In the Debian Buster repository there’s only cockpit version 188, so you have to use the buster backports repository, which contains cockpit version 223.

# install cockpit
echo "deb http://deb.debian.org/debian buster-backports main" > /etc/apt/sources.list.d/buster-backport.list
apt update
apt-get -t buster-backports install cockpit
# add ZFS manager
git clone https://github.com/optimans/cockpit-zfs-manager.git
cp -r cockpit-zfs-manager/zfs /usr/share/cockpit
# start cockpit
systemctl start cockpit.service
systemctl enable cockpit.service
systemctl status cockpit.service

Now browse to https://ip-address-of-machine:9090 and login.

HTPC, Software

[HTPC] hide mouse cursor with Unclutter

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Damit beim Filme schauen auf dem Fernseher nicht immer händisch der Mauszeiger aus dem sichtbaren Bereich geschoben werden muss, habe ich nach einer Lösung gesucht und wurde mit Unclutter fündig: “Unclutter ist ein kleines Hilfsprogramm, das den Mauszeiger verschwinden lässt.”

#install
apt install unclutter
#config
cat /etc/default/unclutter

“Unclutter startet ab dem nächsten Neustart automatisch. Wenn man das oder die Optionen ändern will, kann man es durch Bearbeiten [3] der Datei /etc/default/unclutter mit Root-Rechten erreichen.”
Standardmäßig verschwindet der Mauszeiger nach einer Sekunde. Kann aber natürlich beliebig angepsasst werden.

Software, Terminal

[Software] Using pdfunite to merge PDF documents

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First install pdfunite:

sudo apt update 
sudo apt install poppler-utils

Syntax:

pdfunite source1.pdf source2.pdf merged_output.pdf

If a pdf file is located in a different folder, you have to add the path like this: $home/Downloads/source1.pdf
If you want to merge all pdf’s of the current folder you cant type:

pdfunite *.pdf merged_output.pdf

An alternative with GUI is PDF Arranger.

Software, VirtualBox

[NFS] Mount NFS Share inside VirtualBox VM

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When receiving an error mounting an NFS share inside your VM:

sudo mount -t nfs xxx.xxx.xxx.xxx:/data/media /mnt/nfs/media
mount.nfs: access denied by server while mounting xxx.xxx.xxx.xxx:/mnt/nfs/media

Just change the network adapter of your VM in VirtualBox from “NAT” to “Bridge Mode”.

As alternative you can force the usage of the TCP protocol when mounting, like it is described here.

Mint, Software

[Linux Mint] Install Bitwarden-CLI on Linux Mint 19.2 Cinnamon

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Find their GitHub here and their Documentation here. They recommend installing via NPM. So first we have to install the Node.js runtime if you have not yet.
If you follow the Node.js installation guide you would use:

sudo apt-get install curl python-software-properties
curl -sL https://deb.nodesource.com/setup_12.x | sudo bash -

But this will lead into the following, since 19.2 Tina is not yet support (on 19.1 Tara it will run fine).

## Confirming "tina" is supported...

+ curl -sLf -o /dev/null 'https://deb.nodesource.com/node_12.x/dists/tina/Release'

## Your distribution, identified as "tina", is not currently supported, please contact NodeSource at https://github.com/nodesource/distributions/issues if you think this is incorrect or would like your distribution to be considered for support

So we have to do it manually. I used this little how-to I found on GitHub:

# Add missing signature
sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-key 1655A0AB68576280

# Replace misconfigured  sources file. Change version of node you like to have. 8/10/12
echo -e "deb https://deb.nodesource.com/node_10.x bionic main" | sudo tee /etc/apt/sources.list.d/nodesource.list
echo -e "deb-src https://deb.nodesource.com/node_10.x bionic main" | sudo tee -a /etc/apt/sources.list.d/nodesource.list

# Update packages and install
sudo apt update
sudo apt install nodejs

Finally install Bitwarden-CLI with a single line.

sudo npm install -g @bitwarden/cli

Now you can login into Bitwarden. If you have enabled any two-step login method, you have to add the parameter “–method” and a specific value for the login in method, you can find here. In my case, “0”, as I’m using TOTP.

bw login --method 0

If you successfully logged in, you will get your session key and are able to read your passwords:

To unlock your vault, set your session key to the `BW_SESSION` environment variable. ex:
$ export BW_SESSION="xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
> $env:BW_SESSION="xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
You can also pass the session key to any command with the `--session` option. ex:
$ bw list items --session xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx