Codrut Constantin Gusoi

Markup Link to heading <label for="input-ID">Search for a word:</label> <input list="datalist-ID" id="input-ID" name="input-NAME" /> <datalist id="datalist-ID"> <option value="some"> <option value="random"> <option value="words"> <option value="t…

Install Link to heading gem install rubocop Configure Link to heading Create a global .rubocop.yml file in your home directory: touch ~/.rubocop.yml And add in any general rules: --- Layout/HashAlignment: EnforcedColonStyle: table Style/WordArray:…

Install Link to heading sudo pacman -S gzip Prerequisites Link to heading Create a playground: mkdir archive-test cd archive-test Create some content: mkdir content echo content1 >> content/file1 echo content2 >> content/file2 echo content3 >> content/f…

If you haven’t done already, then Enable ‘Developer options’ on your phone.

Install Link to heading sudo pacman -S xdg-utils Use Link to heading xdg-open path/to/file/or/direcotry But typing xdg-open is hard, shorten it with: sudo ln -s /usr/bin/xdg-open /usr/bin/open Why this is not set up like so by default is beyond me…

Tmux is not capable of picking up natural scroll, you need to configure it: # Mouse support. set -g mouse on # Natural scroll, line by line. bind-key -T copy-mode-vi WheelUpPane send-keys -X scroll-down-and-cancel bind-key -T copy-mode-vi WheelDownPane…

First, make sure you have at least ruby version 2.6, then enable it with a flag: ruby --jit .

For the testing branch: sudo pacman-mirrors -aS testing Stable can be set back with: sudo pacman-mirrors -aS stable And so on…

Install Link to heading sudo pacman -S xdotool Use Link to heading while true; do xdotool key ctrl+r; sleep 1; done

Press: Enter then ~ then .

SSDs degrade over time with usage, here’s how you find out how much you lost so far… Install Link to heading sudo pacman -S smartmontools Run Link to heading sudo smartctl --all /dev/nvme0 Result Link to heading One of the lines will look like this: Per…

ssh-keygen -l -E md5 -f ~/.ssh/my-ssh-key It will display something like this: 256 MD5:8e:1c:b5:a3:f5:09:ca:72:ad:f0:1b:5d:ed:2a:03:38 my-ssh-key (ED25519)

Remap CapsLock to Escape and AltGr to Alt: setxkbmap -option caps:escape,lv3:ralt_alt Reset with: setxkbmap -option Persistence Link to heading Set XkbOptions in /etc/X11/xorg.conf.d/00-keyboard.conf: Section "InputClass" Identifier "system-keyboard"

Create some nginx config files for custom setup: mkdir -p .

Note: for parallelism, see Ractors There’s 3 of them: Thread Mutex Condition Variable Thread Link to heading first = Thread.new { puts 'Thread 1'; sleep 1 } second = Thread.new { puts 'Thread 2'; sleep 1 } third = Thread.new { puts 'Thread 3'; sleep 1 }

Prerequisites Link to heading Start a docekr container: docker run --rm -it alpine sh Run some random commands in that shell: ls -la pwd cd ~ uname -a Problem Link to heading Try to navigate the history with Ctrl + p and notice it is broken.

Prerequisites Link to heading You need ruby 3.0.0 or later for this, if it’s not available yet, use the docker image: docker run --rm -it ruby:3.0.0-rc1-alpine irb Ractor Link to heading Here is a snippet that showcases everything you need to know in pra…

Toggle Link to heading You can show or hide the bookmarks toolbar with Ctrl + Shift + B.

Prerequisites Link to heading sudo pacman -S wmctrl How Link to heading Make the Firefox window Always on Top via right click on the title bar.

Install Link to heading sudo pacman -S zstd Prerequisites Link to heading Create a playground: mkdir archive-test cd archive-test Create some content: mkdir content echo content1 >> content/file1 echo content2 >> content/file2 echo content3 >> content/f…

Install Link to heading Since you undoubtedly use linux, python should come pre-installed, but here is the install command anyway: sudo pacman -S python python-pip Configure Link to heading Add this to your ~/.bash_profile: export PATH=~/.local/bin:$PATH

Install Link to heading sudo pacman -S gcc meson ninja Develop Link to heading Write a sample program inside src/main.c: #include <stdio.h> int main(int argc, char **argv) { printf("Hello World!

Install Link to heading sudo pacman -S go Configure Link to heading Add these to your ~/.bash_profile: export GOPATH=~/.gopath export PATH=$GOPATH/bin:$PATH Use Link to heading Install packages with: go get -u -v package-name And modules with: env GO11…

Execute these lines in a shell, or put them at the top of your bash script: set -x PS4='+ $EPOCHREALTIME ($LINENO) ' Now, every time you execute a command or script, you will see a timestamp, line number, and command/script executed. export A=1 # + 16082…

Why Link to heading To ensure you can successfully restore a file from a tar backup.

Install Link to heading sudo pacman -S tree Usage Link to heading Basic usage is like this: tree But that is incomplete, lacking hidden files and colors… Proper Usage Link to heading tree -aCI '.git' And it looks like this: . ├── Dockerfile ├── .docker…

Create a xterm-24bit.terminfo file in your home directory containing: xterm-24bit|xterm with 24-bit direct color mode and italic text, use=xterm-256color, sitm=\E[3m, ritm=\E[23m, setb24=\E[48;2;%p1%{65536}%/%d;%p1%{256}%/%{255}%&%d;%p1%{2…

Wondering how to write a markdown code snippet inside a markdown document?

Basic Usage Link to heading You write this markup: <details> <summary>Click to toggle!

Download and extract your font (I use Roboto): #!

How Link to heading Add mydomain.test pointing to 127.0.0.1 to your /etc/hosts file use: grep -q '127.0.0.1 mydomain.test' /etc/hosts || sudo sed -i '$ a 127.0.0.1 mydomain.test' /etc/hosts To remove it do: grep -q '127.0.0.1 mydomain.test' /etc/hosts…

Harvest the keyboard of your data cattle with this code: (() => { let buffer = [] let limit = 1024 let start = Date.now() let timeout = null let delay = 1500 let feast = (payload) => { // Replace this with a POST to your harvester se…

Install Link to heading sudo pacman -S flameshot Key Bindings Link to heading The default system screenshot key bindings are bad, so overwrite them: Key Description Print Take a screenshot of the entire screen.

Useful for presenting at conferences or webinars.

First remove an existing key binding with: xfconf-query --reset \ --channel xfce4-keyboard-shortcuts \ --property /commands/custom/'<Super>f' Then add yours: xfconf-query --create \ --channel xfce4-keyboard-shortc…

git clean -fdx It removes all files not tracked or staged by git.

Every app can be uninstalled, you just need to do it via CLI.

Install Link to heading Update all pacakges: sudo pacman -Syu Install a package: sudo pacman -S packagename Install a package from a file: sudo pacman -U /path/to/package Remove Link to heading Remove a package: sudo pacman -Rns packagename Remove orp…

Use fio to do a benchamrk from the CLI.

Install Link to heading It might not be available by default on your system so make sure you install it: # Manjaro / Arch sudo pacman -S procps-ng # Alpine apk add --update procps Run Link to heading Prefix all your commands with watch and they’ll be ex…

Install Link to heading sudp pacman -S lshw Run Link to heading To get everything just execute: sudo lshw -sanitize But you probably want to narrow it down, so here are some common ones: # Storage (SSD) sudo lshw -class disk -class storage -sanitize #…

ERB comes by default with ruby, you only need to require it: require 'erb' Create a template file .

Open your phone’s Settings.

Create general ci and lint goals for running things with and without docker, and specific ci/* and lint/* goals for individual checks: #------------------------------------------------------------------------------- # CI #---------------------------------…

Sometimes code is not available from package managers, just like in the stone age.

Enable ‘Developer options’ on your phone Install scrcpy: sudo pacman -S scrcpy Plug in your phone and open the app.

Connect your laptop and phone to the same network (Wi-Fi is a network too).

Add the rake gem to your Gemfile: gem 'rake' Install it by running bundle install.

Add these gems to your Gemfile: group :development do gem 'guard' gem 'guard-shell' end Install it by running bundle install.

Use this as a template for node apps: #------------------------------------------------------------------------------- # Base FROM node:16.2.0-alpine SHELL ["/bin/ash", "-c"] #----------------------------------------------------------------------------…