watch -n 10 "for d in \$(lsblk -dno NAME | grep -v 'loop'); do      echo \"--- /dev/\$d ---\";      sudo smartctl -a /dev/\$d | sed -nE '/^(  5|194|197|199)/p; /Self-test execution status/{N;p;}';      echo;  done"

1. Disable All Suspend, Sleep, and Hibernate  These commands globally block the system from entering power-saving states.  Mask Sleep Targets: Prevents the system from reaching any sleep state by linking targets to /dev/null. bash sudo systemctl mask sleep.target suspend.target hibernate.target hybrid-sleep.target suspend-then-hibernate.target Modify Sleep Config (Optional): Explicitly disable modes in the configuration file. bash echo -e "[Sleep]\nAllowSuspend=no\nAllowHibernation=no\nAllowSuspendThenHibernate=no\nAllowHybridSleep=no" | sudo tee /etc/systemd/sleep.conf.d/nosuspend.conf Ignore Lid Actions: Prevents laptops from sleeping when the lid is closed. Edit /etc/systemd/logind.conf and set HandleLidSwitch=ignore. Apply with sudo systemctl restart systemd-logind.service.  2. Disable / Re-enable GNOME (GDM3)  For a headless server, you can stop the GUI to save resources or re-enable it for occasional maintenance.  Action Command Description Disable GUI...

 for dev in /dev/sd[a-d]; do sudo smartctl -t short $dev; done for dev in $(smartctl --scan | awk '{print $1}'); do echo "--- Report for $dev ---"; sudo smartctl -A $dev; done for dev in /dev/sd[a-d]; do     echo "=================================================="     echo "DEVICE: $dev"     # Print Model and Serial     sudo smartctl -i $dev | grep -E "Model Family|Device Model|Serial Number"          echo "--- Critical Attributes ---"     # Show Reallocated Sectors (5), Pending (197), and UDMA CRC (199)     sudo smartctl -A $dev | grep -E "ID#|Reallocated_Sector_Ct|Current_Pending_Sector|UDMA_CRC_Error_Count"          echo "--- Latest Test Result ---"     # Show the #1 (most recent) entry from the self-test log     sudo smartctl -l selftest $dev | grep -A 1 "Num  Test_Description" | tail -n 1 done for dev in /dev/sd[a-d]; do     echo "==...

 To automate these alerts on Linux, you can use the smartd daemon (part of smartmontools). It runs in the background and can be configured to email you or run a script the moment an attribute like Current_Pending_Sector or Offline_Uncorrectable changes.  ArchWiki ArchWiki  +4 1. Configure the smartd Daemon  The main configuration file is typically located at /etc/smartd.conf.  Die.net Die.net Open the file: sudo nano /etc/smartd.conf Add a monitoring line: You can monitor all drives or a specific one (e.g., /dev/sda). A robust configuration looks like this: text /dev/sdX -a -o on -S on -n standby,q -s (S/../.././02|L/../../6/03) -m your-email@example.com -M test Use code with caution. -a: Monitors all SMART properties (including the error counts you’re watching). -o on / -S on: Enables automatic offline data collection and attribute persistence. -s ...: Schedules a Short self-test every day at 2 AM and a Long test every Saturday at 3 AM. -m: Sends an email to th...

Since you are on the same Bluefin version with the same Username, this process is very reliable. Because Distrobox is a "wrapper" around Podman, you will use Podman to move the "engine" and a simple file copy to move the "settings." ⚙️ Phase 1: Machine A (The Source) 1. Identify your container name bash distrobox list Use code with caution. (We'll assume the name is graphics-box for these steps.) 2. Stop the container and "Freeze" it into an image bash distrobox stop graphics-box podman commit graphics-box my-graphics-image Use code with caution. 3. Export the image to a file bash podman save my-graphics-image:latest | gzip > ~/Desktop/graphics-box.tar.gz Use code with caution. 4. Collect your App Settings (The "Secret Sauce") Distrobox shares your Home folder, so the settings are actually outside the container. Copy these folders to your USB/Network drive: ~/.config/xnviewmp/ (XnView settings & layout) ~/.config/darktable/ (...

 1. Configure Firefox (Internal Handler)  This tells Firefox to open Gmail whenever it detects a mailto: link.  Open Settings: Click the menu button (≡) and select Settings. Find Applications: In the General panel, scroll to the Applications section. Update Mailto: Find mailto in the Content Type column. Click the Action dropdown and select Use Gmail. Manual Trigger (Optional): If Gmail isn't in the list, open Gmail and look for the Double Diamond icon in the address bar to "Allow" it, or use the javascript:navigator.registerProtocolHandler(...) command in the console.  2. Configure Bluefin (System Handler) This tells the OS to send "Share" requests from other apps (like your file manager) to Firefox. Open GNOME Settings: Open the Activities overview and type Settings. Set Default App: Navigate to Apps > Default Apps. Click the dropdown next to Mail and select Firefox. Terminal Override: If Firefox doesn't appear in the dropdown, run this command: bash xd...

  Phase 1: Create the Fedora 41 Distrobox Run these on your  Bluefin host terminal . We use Fedora 41 for library stability and a custom home to keep your config isolated. bash # 1. Create the container distrobox create --name calibre8 --image registry.fedoraproject.org/fedora-toolbox:41 --home ~/distrobox/calibre8 # 2. Enter the container distrobox enter calibre8 Use code with caution. Phase 2: Install the "Dependency Gauntlet" Run these  inside  the  calibre8  container. These are the specific Fedora packages that satisfy Calibre 8's requirements for X11, OpenGL, and WebEngine. bash # 1. Update and install all required system libraries sudo dnf install -y \ wget xz python3 xdg-utils \ xcb-util-cursor libxcb xcb-util-renderutil xcb-util-image xcb-util-keysyms xcb-util-wm \ libglvnd-opengl libglvnd-egl libglvnd-glx mesa-libGL \ nss nss-util nspr atk at-spi2-atk cups-libs libdrm mesa-libgbm \ libXdamage libXrandr libXcomposite libXft libXtst \ ...

  distrobox-create -i docker.io/cachyos/cachyos-v3:latest -n opencl-dbx -H ~/distrobox/opencl-dbx     1  sudo pacman -S darktable portmidi libcanberra     2  sudo pacman -S intel-compute-runtime ocl-icd clinfo     3  distrobox-export -a darktable     4  exit      /usr/bin/distrobox-enter  -n opencl-dbx  --   bash -c 'GDK_BACKEND=wayland /usr/bin/darktable'  %U

 Here is the breakdown of your rwxpDdaARWcCos string. This is essentially "Full Control" in the NFSv4/ZFS world. The "Big Three" (Standard Unix) r (read_data): Ability to read the contents of a file. w (write_data): Ability to modify an existing file's contents. x (execute): Ability to run a file as a program or search/enter a directory. The "Management" Bits (The "pDd" in your string) p (append_data): Ability to add data to the end of a file or create subdirectories. D (delete_child): (Directory only) Ability to delete files or folders inside this directory. d (delete): Ability to delete the file or folder itself. The "Metadata" Bits (The "aARW" in your string) a (read_attributes): Ability to see basic stat(2) info (size, timestamps). A (write_attributes): Ability to change timestamps (essential for the touch command). R (read_xattr): Ability to read extended attributes (used heavily by macOS for metadata). W (write_xattr...

This configuration allows anonymous "Guest" access to a specific folder while ensuring all files are owned by a restricted local service account. This is ideal for media libraries (audiobooks, movies) on a trusted home network. 1. FreeBSD System Identity (User & Group) Create a dedicated group and a "no-login" service account to handle guest traffic. bash # Create the shared group sudo pw groupadd smbgrp # Create the guest user (no home directory, no shell access) sudo pw useradd smbguest -c "Samba Guest Account" -d /nonexistent -s /usr/sbin/nologin -g smbgrp # Add your primary administrative user to the group sudo pw groupmod smbgrp -m <YOUR_ADMIN_USER> Use code with caution. 2. ZFS Dataset Tuning Set these properties to ensure ZFS manages permissions via inheritance rather than letting individual apps strip them. bash # Replace 'zpool/dataset' with your actual ZFS dataset path sudo zfs set aclinherit=passthrough zpool/dataset sudo zfs s...

 To view the changes after a package installation without using Snapper, you need to manually create read-only Btrfs snapshots of your system's root subvolume before and after the dnf transaction, then use the btrfs send -p command with a pipe to see the file differences. A dedicated tool called btrfs-diff may also be available in your distribution's repositories or as a script online.  Prerequisites You must be using Btrfs as your root filesystem. You need sufficient disk space for the snapshots (snapshots are space-efficient as they only store the changes, not full copies). You'll need root privileges.  Method 1: Using btrfs send -p This method leverages Btrfs's incremental backup feature to list changed files.  Create a pre-installation snapshot: Before running your dnf command, create a read-only snapshot of your root subvolume. bash sudo btrfs subvolume snapshot -r / pre_install_snapshot Install your package: Proceed with your package installation, for example: ...

Set the AutomaticUpdatePolicy to check in /etc/rpm-ostreed.conf: [Daemon] AutomaticUpdatePolicy=check Then reload the service: sudo rpm-ostree reload Enable the timer if not already active: sudo systemctl enable rpm-ostreed-automatic.timer --now This configures the system to check for updates automatically and display them in rpm-ostree status, but does not download or apply them.  You’ll see notifications about available updates, including CVEs, without any automatic downloading. 

  sudo ln -s /path/to/your/image.iso /var/lib/libvirt/images/    Ensure the target path is accessible to the qemu user (e.g., by setting appropriate ownership and permissions). 

sudo rpm-ostree install libvirt libvirt-daemon-config-network libvirt-daemon-kvm qemu-kvm virt-manager virt-viewer systemctl reboot sudo systemctl enable --now libvirtd sudo grep -E '^libvirt:' /usr/lib/group | sudo tee -a /etc/group sudo usermod -a -G libvirt $USER sudo grep -E '^qemu:' /usr/lib/group | sudo tee -a /etc/group sudo usermod -aG qemu tim

Set-ItemProperty -Path "HKLM:\SOFTWARE\Policies\Microsoft\Windows\System" -Name "EnableSmartScreen" -Type DWord -Value 0 If (!(Test-Path "HKLM:\SOFTWARE\Policies\Microsoft\MicrosoftEdge\PhishingFilter")) {     New-Item -Path "HKLM:\SOFTWARE\Policies\Microsoft\MicrosoftEdge\PhishingFilter" -Force | Out-Null } Set-ItemProperty -Path "HKLM:\SOFTWARE\Policies\Microsoft\MicrosoftEdge\PhishingFilter" -Name "EnabledV9" -Type DWord -Value 0

rsync -av --files-from=<(find /SOURCE/ -type f   -newer ~/touched_file | cut -d '/' -f 6) /SOURCE/ /TARGET

hidutil property --set '{"UserKeyMapping":[ { "HIDKeyboardModifierMappingSrc": 0x700000065, "HIDKeyboardModifierMappingDst": 0x7000000E7 } ]}'

defaults write /Library/Preferences/com.apple.PowerManagement.{UID}.plist "AC Power" -dict-add "System Sleep Timer" 0 defaults write /Library/Preferences/com.apple.PowerManagement.{UID}.plist "AC Power" -dict-add "Display Sleep Timer" 0

  hostnamectl set-hostname name zypper install -t pattern devel_basis zypper install cmake

Taken from:  https://askubuntu.com/a/630662 Recently, I bought an Acer Aspire ES1-512 for a college course. As it happens this course requires the students to use Ubuntu. After several unsuccessful attempts to install Ubuntu alongside Windows. I believe I have an answer that allows you to install Ubuntu 14.04.2 alongside Windows 8.1 on an Acer Aspire ES1-512. Some of the steps are from memory, so if something doesn't work please let me know. Steps for Installing Ubuntu: Turn on the laptop and press F2 as soon as you see the "Acer Explore Beyond Limits" screen. This will take you into the UEFI/BIOS screen. If this is the first time you have entered the UEFI/BIOS section there are some adjustments that need to be made. Using the cursor keys highlight the menu item "Main." Network Boot: [Disabled] F12 Boot Menu: [Enabled] D2D Recovery: [Enabled] Wake on LAN: [Disabled] SATA Mode: [AHCI Mode] Touchpad: [Advanced] xHCI Support: [Enabled] Cursor over to the "Secu...

Resizable table using main window resize as redraw trigger. Create an item_resize_handler that calls the table redraw, and bind the main window to it. import dearpygui.dearpygui as dpg import random import string DEBUG = 1 def generate_entries():     entries = []     for x in range(1, 10):         entry = {}         for y in ["A", "B", "C", "D", "E"]:             entry[y] = "".join(random.SystemRandom().choices(string.ascii_uppercase, k=6))         entries.append(entry)     return entries def draw_entry_table(parent, entries):     if dpg.does_item_exist("entry_table"):         dpg.delete_item("entry_table", children_only=False)        table = dpg.add_table(         tag="entry_table",         header_row=True,         parent=parent,         re...

 Opensuse: uses squid. /etc/sysconfig/proxy PROXY_ENABLED="yes" HTTP_PROXY="http://192.168.1.118:3128/" Ubuntu: uses apt-cacher-ng. /etc/apt/apt.conf.d/02proxy Acquire::http { Proxy "http://fileserv:3142"; }; Arch: uses nginx. /etc/pacman.d/mirrorlist Server = http://fileserv:8080/archlinux/$repo/os/$arch

asdf python poetry python3 -m pip install --user pipx python3 -m pipx ensurepath pipx install black pipx install mypy pipx install flake8

[env:nodemcuv2_client] platform = espressif8266 board = nodemcuv2 framework = arduino upload_port = COM11 monitor_port = COM11 monitor_speed = 115200 build_flags = -D CLIENT -save-temps=obj -fverbose-asm  ;-D L_DEBUG [env:nodemcuv2_server] platform = espressif8266 board = nodemcuv2 framework = arduino upload_port = COM8 monitor_port = COM8 monitor_speed = 115200 build_flags = -D SERVER  ;-D L_DEBUG

pktmon filter add -p 4120 pktmon start --etw -m real-time pktmon filter remove ncat -lnuvx -p 4120

service calibre stop rsync -av --no-p --modify-window=2 /Volumes/Local/ebooks/Calibre\ Library/ /Volumes/ebooks/Calibre_Library /

poetry install --no-dev poetry shell pip list --format=freeze > requirements.txt Delete project from requirements.txt. Update Dockerfile. Delete any existing containers. docker build -t command_name .

Pad lines with spaces:  : %s/.*/\=printf('%-63s', submatch(0))

 Edit /etc/sysconfig/proxy. zypper up zypper lr zypper mr -d repo-backports-update zypper mr -d repo-sle-update zypper lr mkdir /etc/zypp/repos.d/old mv /etc/zypp/repos.d/*.repo* /etc/zypp/repos.d/old zypper ar -f -c http://download.opensuse.org/tumbleweed/repo/oss repo-oss zypper ar -f -c http://download.opensuse.org/tumbleweed/repo/non-oss repo-non-oss zypper ar -f -c http://download.opensuse.org/tumbleweed/repo/debug repo-debug zypper ar -f -c http://download.opensuse.org/update/tumbleweed/ repo-update reboot to level 3. zypper cc -a && zypper ref && zypper dup --allow-vendor-change rpm --import https://dl.google.com/linux/linux_signing_key.pub zypper addrepo https://dl.google.com/linux/chrome/rpm/stable/x86_64 Google-Chrome zypper ref zypper install google-chrome-stable rpm --import https://packages.microsoft.com/keys/microsoft.asc zypper addrepo https://packages.microsoft.com/yumrepos/vscode vscode zypper ref zypper install code