Next we will set up a useful workflow for this case. But, this setup will use new feature, which is hardwired into Hyprland and most likely absent in other DEs/compositors. I will demonstrate our final goal. For example, my screen share can be looks, like this:

If you like my wallpaper you can find this and more very good stuff in my dotfiles repository on GitHub. Don’f forget: I love your stars!

Let’s go step-by-step. Firstly, let’s recall that in Hyprland release of version 0.50.0 a new windowrulev2 option noscreenshare was added. It’s a new release and now it isn’t controlled from hyprctl only from the config file, like this:

windowrulev2 = noscreenshare, class:^(org.telegram.desktop|obsidian|discord)$

This option will tell Hyprland to draw a black rectangle instead of window content (even if this window isn’t in focus or int the background). This works perfect and protects our privacy. But, I’ve found two inconvenient cases: 1. When we want to make screenshot (in my case, with flameshot) Hyprland interpret it as try to share our screen and hide all privacy windows. 2. Sometimes, I want to share something from my Obsidian, for example, and dive into configs in this moment — not so good.

# CLI control noscreenshare option

To fix this experience, let’s write a script for control window rule in config. If you don’t have time, the full version of the script here. Script will comment or uncomment line in config file with rule and save info about current rule state in maker-file ~/.config/hypr/.screenshare_rule_disabled. And script can be run with command toggle to change state to the opposite:

#!/bin/bash

CONFIG_FILE="$HOME/.config/hypr/hyprland.conf"
STATE_FILE="$HOME/.config/hypr/.screenshare_rule_disabled"

toggle_rule() {
	# TODO
}

case ${1} in
    "toggle")
        toggle_rule
        ;;
esac

Let’s write toggle_rule function. We will use sed (Stream Editor) Linux util. It’s one of the most powerful tools for text processing in Linux and Unix systems. It’s commonly used for tasks like search and replace, text transformation, and stream editing. Syntax of sed, in general, looks like this:

sed [options] "script" [file...]

We need -i option edit file in-place. Then write a script. Firstly we need to find string with noscreenshare rule, like in regex:

"/windowrolev2.*noscreenshare.*"

We start with "/" for write search query, this we need to line start with "windowrolev2", after that ".*" for any count of any symbols, between which "noscreenshare". Then we use "/" for end search query, and "s/" (substitute) for replace:

"/windowrulev2.*noscreenshare.*/s/^#//"

Finally, we use "^#" regular expression for find hash at the start of line and replace it to nothing: "//". Full command looks like:

sed -i '/windowrulev2.*noscreenshare.*/s/^#//' "$CONFIG_FILE"

Then use sed for add hash to start of line similar, depending on existence of marker-file:

toggle_rule() {
    if [ -f "$STATE_FILE" ]; then
        sed -i '/windowrulev2.*noscreenshare.*/s/^#//' "$CONFIG_FILE"
        rm -f "$STATE_FILE"
        CLASS="on"
    else
        sed -i '/windowrulev2.*noscreenshare.*/s/^/#/' "$CONFIG_FILE"
        touch "$STATE_FILE"
        CLASS="of"
    fi
}

In last step of script, we call this function, if toggle option was given, and return a json-like string for waybar. Full script:

#!/bin/bash

CONFIG_FILE="$HOME/.config/hypr/hyprland.conf"
STATE_FILE="$HOME/.config/hypr/.screenshare_rule_disabled"

toggle_rule() {
    if [ -f "$STATE_FILE" ]; then
        sed -i '/windowrulev2.*noscreenshare.*/s/^#//' "$CONFIG_FILE"
        rm -f "$STATE_FILE"
        CLASS="on"
    else
        sed -i '/windowrulev2.*noscreenshare.*/s/^/#/' "$CONFIG_FILE"
        touch "$STATE_FILE"
        CLASS="off"
    fi
}

case ${1} in
    "toggle")
        toggle_rule
        ;;
    *)
        if [ -f "$STATE_FILE" ]; then
            CLASS="off"
        else
            CLASS="on"
        fi
        ;;
esac

echo "{\"class\": \"$CLASS\", \"alt\": \"$CLASS\"}"

# Waybar module

To use this conveniently and instantly detect the current privacy state we write a waybar module:

"custom/noscreenshare": {
  "exec": "~/scripts/toggle_noscreenshare.sh",
  "on-click": "~/scripts/toggle_noscreenshare.sh toggle && pkill -SIGRTMIN+4 waybar",
  "signal": 4,
  "interval": "once",
  "return-type": "json",
  "format": "{icon}",
  "format-icons": {
    "off": "",
    "on": "󰗹"
  },
  "tooltip": false
},

Let’s describe whats going on here. To get value for this module we use exec field and set our script. Then we defined what will happen, when we click on module at on-click option: run script with toggle option and send system signal to waybar. This allows you to not reload all waybar process, but only this module. Here it’s very important to sync signal value and number at pkill -SIGRTMIN+4 waybar command, and to make this value unique only for this waybar module. Then we configure to run our script once on waybar startup and define view format (tooltip: false for not showing text, when hovering over cursor) . I’m using this nerdfonts icons for this, but they are not the same size. Therefore I fine-tune padding and add some styles:

#custom-noscreenshare {
  background: #1e1e2e;
  opacity: 0.7;
  padding: 0px 10px;
  margin: 5px 5px 3px 0px;
  border: 0px solid #181825;
  border-radius: 10px;
}

#custom-noscreenshare.on {
  font-size: 18px; 
  padding-right: 14px;
}

#custom-noscreenshare.off {
  font-size: 16px;
  padding-right: 16px;
  padding-left: 9px
}

After that we have got nice interface for hands-on control of our privacy:

Now we will understand how to find the desired value and then make a beautiful minimalistic waybar module for battery.

# Find a battery degradation value

Firstly get list of all power devices:

upower -e

Then find battery from this list:

upower -e | grep BAT

# For example:
# /org/freedesktop/UPower/devices/battery_BATT

Then get detailed information about this device, with -i flag of upower:

upower -i $(upower -e | grep BAT)

We got something like this:

  native-path:          BATT
  vendor:               DESAY
  model:                BASE-BAT
  serial:               1
  power supply:         yes
  updated:              Fri Jul 11 11:37:00 2025 (7 seconds ago)
  has history:          yes
  has statistics:       yes
  battery
    present:             yes
    rechargeable:        yes
    state:               charging
    warning-level:       none
    energy:              25.514 Wh
    energy-empty:        0 Wh
    energy-full:         47.5052 Wh
    energy-full-design:  59.4247 Wh
    energy-rate:         11.1573 W
    voltage:             11.972 V
    charge-cycles:       650
    time to full:        2.0 hours
    percentage:          53%
    capacity:            79.9417%
    technology:          lithium-ion
    charge-start-threshold:        75%
    charge-end-threshold:          80%
    charge-threshold-supported:    yes
    icon-name:          'battery-good-charging-symbolic'
  History (charge):
    1752222927	53.000	charging
  History (rate):
    1752223020	11.157	charging
    1752222990	11.123	charging
    1752222987	11.192	charging
    1752222957	10.822	charging
    1752222927	10.857	charging

Here many interesting information, for example charge-cycles, time to full battery, and so on. But now we use two parameters:

• energy-full-design — the original full battery volume
• energy-full — current battery volume Deference between this two parameters is degradation of battery: $$ \text{Degradation} = \left(1 - \frac{E_{\text{full}}}{E_{\text{design}}}\right) \times 100\% $$ Now let’s calculate this metric in percents.

First find this parameters in big output and devide them, with awk:

upower -i $(upower -e | grep BAT) | awk '\
	/energy-full:/ {ef=$2}\
	/energy-full-design:/ {efd=$2}\
	END {print ef/efd}'

Here we find energy-full and save to variable ef, find enengry-full-design and save to efd variable. On the end we divide them: ef/efd.

After that calculate percent value, with bc (is shell calculator for expression with float numbers):

echo "(1 - $(upower -i $(upower -e | grep BAT) | awk '\
        /energy-full:/ {ef=$2}\
        /energy-full-design:/ {efd=$2}\
        END {print ef/efd}')) * 100 + 0.5" \
	| bc

# Output example:
# 20.558200

Here we make + 0.5 for rounding when the fractional part is cut off later.

In last step we need to round value. We make it simple: we already add 0.5 to value and now it remains to cut off the fractional part with cut util:

echo "(1 - $(upower -i $(upower -e | grep BAT) | awk '\
        /energy-full:/ {ef=$2}\
        /energy-full-design:/ {efd=$2}\
        END {print ef/efd}')) * 100 + 0.5" \
	| bc \
	| cut -d'.' -f1

# Output example:
# 20

Here -d'.' means we split by dot and -f1 means we take first part.

# Waybar module

In my waybar config ~/.config/waybar/config.json I’m add two modules on right section, but you can do as you want. Finally i’m got this:

If you like my wallpaper you can find this and more very good stuff in my dotfiles repository on GitHub. Don’f forget: I love your stars!

Let’s see:

{
  "modules-left": [...],
  "modules-center": [...],
  "modules-left": [...],
  "modules-right": [
    "battery",
    "custom/battery-degradation",
  ],
}

First module it’s default battery module, for me it’s great work on hyprland. Here we define levels of good, warning and critical level of charging, define nerd icons format for different battery state:

"battery": {
  "states": {
    "good": 90,
    "warning": 25,
    "critical": 10
  },
  "format": "{icon} {capacity}%",
  "format-charging": " {capacity}%",
  "format-plugged": " {capacity}%",
  "format-icons": ["󰂎", "󰁺", "󰁻", "󰁼", "󰁽", "󰁾", "󰁿", "󰂀", "󰂁", "󰂂", "󰁹"],
  "tooltip": "{time}",
  "style": "{capacity < 10 ? 'color: red;' : 'color: normal;'}"
}

Second module it’s today topic: custom/batterydegradaion:

"custom/battery-degradation": {
  "format": " {}%",
  "interval": "once",
  "exec": "~/scripts/battery-degradation.sh",
  "tooltip": false
}

I’m put our command to script, for me it’s useful. You can do same, don’t forgot add shebang #!/bin/bash and:

chmod +x ~/scripts/battery-degradation.sh

In module we define the format with nerd icon and percent, turn off tooltip and set run once on waybar start (because this parameter changing very long).

And finish this modules with css style in ~/.config/waybar/style.css:

#battery,
#custom-battery-degradation {
  background: #1e1e2e;
  opacity: 0.7;
  padding: 0px 10px;
  margin: 3px 0px;
  margin-top: 5px;
  border: 0px solid #181825;
}

#battery {
  padding-right: 10px;
  border-radius: 10px 0px 0px 10px;
  min-width: 50px;
}

#custom-battery-degradation {
  border-radius: 0px 10px 10px 0px;
  margin-right: 5px;
  min-width: 35px;
}

#battery.critical {
  color: red;
}

Done! As result:

docker system prune

# 1. Clean packages

Next tips for Arch-base systems:

Find heaviest packages. This command show top-20 most heavy packages:

pacman -Qi | awk '/^Name/{name=$3} /^Installed Size/{print $4 $5, name}' | sort -hr | head -n 20

Find unused dependencies:

pacman -Qdtq

Pay attention, in this list can be important packages for you, that are no one is using, it’s doesn’t mean this need to be remove.

If you’re sure, you can be remove all this list:

sudo pacman -Rns $(pacman -Qdtq)

Find forgotten packages. This command show top-20 long-unused packages:

expac --timefmt='%Y-%m-%d %T' '%l %n' | sort | head -n 20

Clean pacman cache. This command remove all old versions of packages, apart from last and current:

sudo paccache -r

This command remove all packages, apart from current installed:

sudo paccache -r -k 0

Keep in mind, after that you can be rollback to old package version without internet.

# 2. Clean files

This command show top-15 the heaviest directories at home:

du -h ~/ --max-depth=1 | sort -hr | head -n 15

This command show top-20 the heaviest directories at home:

find ~/ -type f -exec du -Sh {} + | sort -rh | head -n 20

I think that’s two command enough to do all clean up what you want. You can find heavies directory at home, than go here. Then again run command for this directory. Then go to heaviest, then find heavy files…