Post tagged: boot

Raspberry Pi emulation with Qemu

The idea here is that we use a Desktop PC for developing/debugging Raspberry Pi set-ups using qemu for emulating Rasperrby Pi.

qemu currently supports the following configurations:

• Raspberry Pi Zero and 1A+ (armhf)
• Raspberry Pi 2B (armv7)
• Raspberry Pi 3A+ (aarch64)
• Raspberry Pi 3B (aarch64)
  • This is the version …

Moving to Home Assistant

I am busy moving away from my VeraEdge installation to a Home Assistant running on a Raspberry Pi 4. This is because it looks like the maker of the VeraEdge was bought and it is slowly being phased out.

For this I am using the following parts:

• Geekwork X728 18650 …

X728 kit for Raspberry Pi 4

As part of my small project of movng my Z-Wave Hub to a Raspberry PI, I got an X728 kit. This has:

• UPS controller board
  • RTC circuit
  • Battery and Power control board
• Case
  • Button
  • Cooling fan
  • Additional Battery holder

The case has holes for wall-mounting.

The Geekworm X728 kit is …

voidlinux virtualization

This recipe is for setting virtualization on a voidlinux desktop.

Use this setup script to set things up on void linux.

Connecting to libvirtd

Note that virsh and virt-manager commands connect to different libvirtd sessions by defauult.

virsh defaults to qemu:///session while virt-manager to qemu:///system.

It is better …

Alpine Boot switcher

I boot from a USB boot drive using UEFI. Because of the UEFI boot, it just a matter of copying the files from the alpine ISO to a USB thumbdrive VFAT32 partition. Partition may be set to EFI (but this doesn't seem to be required).

Since I would like to …

Encrypting FileSystem in Void Linux

The point of this recipe is to create a encrypted file sytem so that when the disc is disposed, it does not need to be securely erased. This is particularly important for SSD devices since because of block remapping (for wear levelling) data can't be overwritten consistently.

The idea is …

Installing Void Linux

I made the switch to void linux. Except for compatibility issues around glibc, it works quite well. Most compatibility I have worked around with a combination of Flatpaks, chroots and namespaces.

The high lights of void linux:

• musl build - which is very lightweigth
• Does not depend on systemd …

Docker on Alpine Linux

Alpine Linux Quick installation

See wiki For Alpine Linux > 3.8

1. Un-comment community repo from /etc/apk/repositories
2. apk add docker
3. rc-update add docker boot
4. service docker start

Optional: (docker compose)

apk add docker-compose

Note 2021-03-21: When I tested this, the daemon.json did not work! Your mileage may vary …

custom desktop ideas

• fast boot

Window Manager

• Snap windows to border/windows

File Manager

• Next style file manager
• TkDesk : Note, it use [incr tcl]
• TkMC : Basic file browser functionality
• TOXFile: Another file manager
• TkWm

Notification and Tray areas

Launcher

Applications

• browser
• media player
• photo/video manager (or webapp)
• office apps (open365.io)
• ah …

Retropie

• DVD player
• Bluetooth receiver
• keyboard

• good keyboard bindings
• how to exit games
• convert probox into binding keys
• where are key codes saved

• Write image:
  • gunzip < retropie-4.3-rpi2_rpi3.img.gz | sudo dd of=/dev/sde bs=4M
• Configure config.txt
  • hdmi_force_hotplug=1
  • hdmi_drive=2
• Boot and configure keyboard
  • D-Pad => D-Pad
  • start …

CyberWorld 2017.1

Development - travis cordova build - travis ionic build

• owx
  • common
    • muninlite (can it support plugins?)
    • flock, pwgen, ifstat
  • ow1
    • diags&tools: usbutils, netstat-nat
    • sniffer: tcpdump[-mini] 317K/617K, libpcap 191K
  • owX
    • FW/NAT
    • DNSMASQ: DHCP + DNS
    • NTP server
    • Dynamic DNS updating (mushu porker)
    • NFS
    • IPv6 tunnel
    • Provisioning server: (PXE, TFTP, NFS …

Resizing a Linux RAID

It is possible to migrate the whole array to larger drives (e.g. 250 GB to 1 TB) by replacing one by one. In the end the number of devices will be the same, the data will remain intact, and you will have more space available to you.

Extending an …

Using a NAS200 as a Print server

Last weekend I had a small weekend project to move my All-In-One Printer/Scanner from my Xen host server to a spare NAS200 I had lying around. Since the NAS200 has a i486 compatible CPU, and I had been able to run a CentOS 5 distro before, I figure it …

assist

Assist is my archlinux scripted installation script.

• https://github.com/alejandroliu/assist

By default it gives you a menu driven archlinux installation with supposedly sensible defaults.

It has command line hooks so that you can perform automated installs using bash scripts to customize it.

It can be deployed from the …

Diskless Archlinux

I am still to test this recipe

Server Configuration

First of all, we must install the following components:

• A DHCP server to assign IP addresses to our diskless nodes.
• A TFTP server to transfer the boot image (a requirement of all PXE option roms).
• A form of network storage (NFS …

ArchLinux tips

A bunch of recipes useful for an ArchLinux system environment.

Mostly around system administration.

Custom Repos and Packages

In the repo directory, put all the packages in there.

repo-add ./custom.db.tar.gz ./*

Add to pacman.conf:

[custom]
SigLevel = [Package|Databse]Never|Optional|Required
Server = path-to-repo

See also repo-remove. A …

Kerberos howtos

Kerberos is a network authentication protocol which works on the basis of "tickets" to allow nodes communicating over a non-secure network to prove their identity to one another in a secure manner. (Source Kerberos_(protocol) )

Backups

Create backup:

kdb5_util dump _dump_file_

Restore from dump file:

kdb5_util load _dump_file_

Master/Slave …