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Here is the best setup (I think so :D) for K-series Keychron keyboards on Linux.

Most of these commands have been tested on Ubuntu 20.04 and should also work on most Debian-based distributions. If a command happens not to work for you, take a look in the comment section.

Make Fn + F-keys work

Keychron Keyboards on Linux use the hid_apple driver (even in Windows/Android mode), both in Bluetooth and Wired modes. By default, this driver uses the F-keys as multimedia shortcuts and you have to press Fn + the key to get the usual F1 through F12 keys.

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#!/usr/bin/jjs

if (new Date().getHours() > 7) {
	$EXEC("wget 'https://open-todo.herokuapp.com' -O /dev/null")
} 

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#!/usr/bin/env python3

from sys import argv
from picamera import PiCamera
from datetime import datetime

def resolve_file_name(arguments):
  if len(arguments) == 2:
    return arguments[1]
  else:

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package de.idealo.ecommerce.order.history.config;

import java.util.Arrays;
import java.util.stream.StreamSupport;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.context.event.ContextRefreshedEvent;
import org.springframework.context.event.EventListener;
import org.springframework.core.env.AbstractEnvironment;

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#!/usr/bin/env ruby
require 'fileutils'

VALID_FILE_TYPES = ["mp3", "flac", "waw", "aac"]

def print_usage() 
    puts "music-copy.rb <SOURCE> <DESTINATION>"
end    

def validate_args()

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-- show running queries (pre 9.2)
SELECT procpid, age(clock_timestamp(), query_start), usename, current_query 
FROM pg_stat_activity 
WHERE current_query != '<IDLE>' AND current_query NOT ILIKE '%pg_stat_activity%' 
ORDER BY query_start desc;

-- show running queries (9.2)
SELECT pid, age(clock_timestamp(), query_start), usename, query 
FROM pg_stat_activity 
WHERE query != '<IDLE>' AND query NOT ILIKE '%pg_stat_activity%' 

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Install pgAdmin4 v2.0 with python3 on Ubuntu 16.04 DESKTOP mode

1. Get Python Wheel pgAdmin4

    wget https://ftp.postgresql.org/pub/pgadmin/pgadmin4/v2.0/pip/pgadmin4-2.0-py2.py3-none-any.whl
   

2. Install pip3

    sudo apt install python3-pip
   

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#!/usr/bin/env groovy

@Grab('org.gebish:geb-spock:2.1')
@Grab('org.seleniumhq.selenium:selenium-chrome-driver:3.6.0')
@Grab('org.seleniumhq.selenium:selenium-support:3.6.0')
@Grab('com.caseyscarborough.colorizer:groovy-colorizer:1.0.0')
import geb.Browser
import com.caseyscarborough.colorizer.Colorizer

final String KAM_URL = 'https://kam.lt/lt/aktuali_informacija_apie_privalomaja_karine_tarnyba/new_2716.html'

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#!/usr/bin/env groovy

@Grab(group='org.seleniumhq.selenium', module='selenium-server', version='3.6.0')
@Grab(group='org.seleniumhq.selenium', module='selenium-java', version='3.6.0')
@Grab(group='org.seleniumhq.selenium', module='selenium-chrome-driver', version='3.6.0')

import org.openqa.selenium.By
import org.openqa.selenium.JavascriptExecutor
import org.openqa.selenium.WebDriver
import org.openqa.selenium.WebElement

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# cat activemq.service
[Unit]
Description=Apache ActiveMQ
After=network-online.target

[Service]
Type=forking
WorkingDirectory=/opt/activemq/bin
ExecStart=/opt/activemq/bin/activemq start
ExecStop=/opt/activemq/bin/activemq stop