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Solusi Masalah Wi-Fi, DHCP, dan DNS

Ringkasan Masalah

Gejala awal:

• wlan0 sudah UP, tetapi belum memiliki IPv4.

• iwctl menunjukkan Wi-Fi sudah connected.

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🧭 Panduan: Memperbaiki Browser yang Tidak Bisa Membuka File Explorer di Arch Linux + DWM

🧩 Latar Belakang

Di sistem minimalis seperti DWM, kadang browser (Chrome, Firefox, dsb) tidak bisa membuka file picker (dialog pilih file).
Masalah ini biasanya disebabkan oleh xdg-desktop-portal yang tidak punya backend aktif (xdg-desktop-portal-gtk).

---

🔍 1. Periksa Proses Portal

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function copyCollections(
  sourceDbName,
  collectionNames = [],
  targetDbName = "tenant_operation",
  batchSize = 1000
) {
  const sourceDb = db.getSiblingDB(sourceDbName);
  const targetDb = db.getSiblingDB(targetDbName);

  for (const collectionName of collectionNames) {

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Untuk menyambungkan perangkat Bluetooth di Linux melalui terminal, Anda dapat menggunakan alat bluetoothctl. Berikut adalah langkah-langkahnya:

1. Pastikan Bluetooth Aktif

Buka terminal di sistem Linux Anda. Pastikan layanan Bluetooth berjalan. Anda dapat memeriksa dan memulai layanan Bluetooth dengan perintah berikut:

sudo systemctl start bluetooth
sudo systemctl enable bluetooth

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Berikut adalah contoh penggunaan mockall untuk mocking dependencies pada Actix-Web, beserta unit test:

1. Buat sebuah service yang akan diuji, misalnya user_service.rs:

use actix_web::{get, web, Responder};
use mockall::predicate::*;
use mockall::MockResult;

#[derive(Debug)]

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# in node repl, type...
require('crypto').randomBytes(64).toString('hex')

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const fontMerah = 'font-size:50px; font-weight:bold; color:red; -webkit-text-stroke:1px black;';
const fontBiasa = 'font-family:helvetica; font-size:20px;'

console.log('%cStop!', fontMerah);
console.log('%cThis is a browser feature intended for developers. If someone told you to copy and paste something here to enable a Facebook feature or "hack" someone\'s account, it is a scam and will give them access to your Facebook account.', fontBiasa);
console.log('%cSee https://www.facebook.com/selfxss for more information.', fontBiasa);

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mysql mongod teamviewerd mssql-server nginx redis-server postgresql

# how to enable, disable, start, stop, and status
sudo systemctl enable <name_of_service>
sudo systemctl start <name_of_service>
sudo systemctl status <name_of_service>
sudo systemctl stop <name_of_service>
sudo systemctl disable <name_of_service>

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After automatically updating Postgres to 10.3 via Homebrew, the pg_ctl start command didn't work.
The error was "The data directory was initialized by PostgreSQL version 9.6, which is not compatible with this version 10.3."

Database files have to be updated before starting the server, here are the steps that had to be followed:

# if default not linked to version 10.3 run this script,otherwise skip
# need to have both 9.6.x and latest 10.3 installed, and keep 10.3 as default
# brew unlink postgresql
# brew install postgresql@9.6
# brew unlink postgresql@9.6

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<snippet>
    <content><![CDATA[/**
 * Getter for ${1:$SELECTION}
 *
 * @return ${2:mixed}
 */
public function get${1/^(\w)|(?:_(\w))|(?:_)/(?1\u$1:)(?2\u$2:)/g}()
{
    return \$this->$1;
}