UPS CyberPower OR600ELCDRM1U

September 11, 2025NUT, UPSRoman

Battery replacement

I was able to get battery replacement at tsbohemia.cz.

NUT tools configuration

[ups]
  driver = usbhid-ups
  port = auto
  desc = "CyberPower OR600ELCDRM1U"

svn

September 10, 2025Cheat Sheet, SVNRoman

========================================
        Subversion (SVN) Cheatsheet
========================================

Checkout
  svn checkout URL [url]

Update working copy
  svn update

Commit changes
  svn commit -m "Changes description"

Working copy status
  svn status

Show diff
  svn diff

Show diff with colors (requires colordiff package)
  svn diff | colordiff

Add new file
  svn add file

Copy file
  svn copy file

Delete file
  svn delete file

Rename / move file
  svn move old_name new_name

Show log (history)
  svn log [file]

Revert local changes
  svn revert file
  svn revert -R directory (recursively)

Armac Home 650E LED

September 10, 2025NUT, UPSRoman

NUT tools config

[ups]
  driver = nutdrv_qx
    subdriver = armac
  port = auto
  desc = "Armac Home 650E"

APC Back-UPS 1400 (BX1400UI)

September 10, 2025NUT, UPSRoman

Battery replacement

I was able to get battery replacement at alza.cz.

Replacing the batteries in this UPS is not very easy.

NUT tools configuration

[ups]
  driver = usbhid-ups
  port = auto
  desc = "APC Back-UPS BX1400UI"

Create bootable Windows installation USB from Linux

September 9, 2025Arch Linux, Linux, WindowsRoman

Download Ventoy from Github and extract it.

Install Ventoy to USB: sudo ./Ventoy2Disk.sh -i /dev/sdX

Copy Windows installation ISO to USB: cp Win11.iso /run/media/$USER/Ventoy/

Migrate Debian Buster (10) APT to Archive

September 8, 2025DebianRoman

The following script replaces repository URLs to allow installation of apps on this legacy Debian version.

sed -i \
    -e 's|deb.debian.org/debian-security|archive.debian.org/debian-security|g' \
    -e 's|deb.debian.org/debian|archive.debian.org/debian|g' \
    /etc/apt/sources.list

Download Gravatar image from CLI

September 3, 2025Gravatar, LinuxRoman

First you need to compute hash of your e-mail.

echo -n "[email protected]" | sha256sum

Than you can download it using curl. Replace HASH with the output from the previous command.

curl -fL "https://www.gravatar.com/avatar/HASH?s=500&d=404" -o avatar.jpg

Parameters

s=500 (Gravatar supports 1–2048px size)
d=404 (If there is no image return HTTP 404)
r=pg|r|x (To change rating)

See more information on Gravatar docs.

Fetch hardware info from CLI

August 28, 2025Arch Linux, LinuxRoman

Neofetch is no longer supported, but there is actively maintened alternative called fastfetch for fetching system information and displaying it in a visually appealing way.

sudo pacman -S fastfetch

Replace text in multiple files

August 20, 2025Linux, WindowsRoman

Using find and sed a text in multiple files can be replaced using a one liner. If you have GIT bash you can do it in Windows too.

In the example below address of old.server.com will be replaced with new.server.com in all Web.config files.

find /c/inetpub/wwwroot -name "Web.config" -exec sed -i 's/old.server.com/new.server.com/g' {} +

Upgrade Debian 11 to Debian 12

August 12, 2025DebianRoman

I use those steps on LXC virtual in Proxmox:

Make sure all packages are upgraded: apt update && apt upgrade
Backup container in Proxmox
Edit release version: sed -i'.bak' 's/bullseye/bookworm/g' /etc/apt/sources.list
Update other configuration files in /etc/apt/sources.list.d/ appropriately
Update packages index: apt update
Do minimal system upgrade: apt upgrade --without-new-pkgs
Do full upgrade: apt full-upgrade
Restart the system: reboot

See detailed instructions here.