SysAdmin on Junian Dev

Old Pages, Numbers, and Keynote iWork macOS App Download Links

author@junian.dev (Junian Triajianto) — Sat, 31 Jan 2026 19:00:00 +0700

UPDATE 2026/04/13 RIP 🪦: Per Aaron Perris, a MacRumors analyst, Apple has removed the non-Creator Studio version of Pages, Keynote, and Numbers for macOS. If you already had these apps, you can download them again from your purchase history. But if you’re a new user looking on the App Store, the only option you’ll find is the Creator Studio version.

Recently, Apple introduced Apple Creator Studio, which includes the latest versions of Pages, Numbers, and Keynote. It is free to download and use, with an optional subscription for additional features. For most users, this version works perfectly fine.

How to Check Disk Drive Allocation Unit Size on Windows

author@junian.dev (Junian Triajianto) — Thu, 29 Jan 2026 19:00:00 +0700

I was working on a task to ensure that the NTFS drives installed on several Windows PCs all use the same allocation unit size. I needed a reliable way to check this information.

As it turns out, it’s quite simple.

First, open the Terminal app as an administrator.

Then, run the following command:

fsutil fsinfo ntfsinfo {Drive_Letter:}

Replace {Drive_Letter:} with the letter of the drive you want to inspect. For example, to check the C: drive:

Managing macOS System Extensions From the Terminal

author@junian.dev (Junian Triajianto) — Mon, 01 Dec 2025 19:00:00 +0700

You can list installed system extensions on macOS from the Terminal.

To do that, you can use the following command:

systemextensionsctl list

For example, on macOS I have several system extensions including the camera extension from Open Broadcaster Software or the OBS app.

$ systemextensionsctl list
3 extension(s)
--- com.apple.system_extension.cmio (Go to 'System Settings > General > Login Items & Extensions > Camera Extensions' to modify these system extension(s))
enabled active  teamID  bundleID (version)      name    [state]
*       *       TQ5W6RYNUV      com.antonmeier.webcamplus.server.macOS-Camera-Extension (2.0.0/3)       macOS-Camera-Extension  [activated enabled]
*       *       2MMRE5MTB8      com.obsproject.obs-studio.mac-camera-extension (32.0.2/18749313472)     OBS Virtual Camera      [activated enabled]
--- com.apple.system_extension.network_extension (Go to 'System Settings > General > Login Items & Extensions > Network Extensions' to modify these system extension(s))
enabled active  teamID  bundleID (version)      name    [state]
*       *       VBG97UB4TA      com.objective-see.lulu.extension (4.2.0/4.2.0)  LuLu    [activated enabled]

Now, let’s say you want to uninstall OBS. After you uninstall it, the OBS Camera extension is still there. To remove it from your macOS, you can use the following command:

How to Allow Underscore Headers in Nginx

author@junian.dev (Junian Triajianto) — Sun, 28 Sep 2025 02:43:24 +0700

Have you ever noticed that some HTTP request headers are missing when using Nginx?

I experienced this issue myself. Headers containing underscores (such as _Security_Token_ or _Device_ID_) were silently dropped by Nginx. This caused problems during mobile app testing, as token authentication kept failing.

It turns out that HTTP headers with underscores are uncommon and generally discouraged when possible.

The problem is, sometimes you don’t have control over how the upstream server works.

How to Uninstall Old .NET SDK and Runtime Versions on macOS

author@junian.dev (Junian Triajianto) — Mon, 08 Sep 2025 09:43:28 +0700

If you’re a .NET developer using macOS, you might not realize that old versions of the .NET SDK and Runtime can take up valuable storage space. When you install a new .NET version, previous versions are usually left behind. This is often helpful for testing different .NET versions side by side.

Fortunately, you can easily identify all installed .NET versions on macOS using Terminal.

Check Installed .NET SDKs and Runtimes

First, let’s see which .NET SDKs and Runtimes are installed on your system. Run the following command:

How I Accidentally Discovered Crypto-Miner Malware (perfctl) on an Ubuntu Server

author@junian.dev (Junian Triajianto) — Fri, 03 Jan 2025 13:12:21 +0700

It all started with an Upwork job described as follows:

Help Installing MongoDB CE 8 on Ubuntu 24.04 LTS

I followed the instructions here:
https://www.mongodb.com/docs/manual/tutorial/install-mongodb-on-ubuntu/
But obviously, I’m missing something. Any help would be greatly appreciated.

Upwork Job Post

I submitted my proposal, thinking it would be a straightforward task—just follow the MongoDB installation guide, and it’d be done in minutes.

How to Install AdGuard Home on Windows

author@junian.dev (Junian Triajianto) — Thu, 21 Mar 2024 14:47:48 +0700

If you’re like me, you know the internet is a vast ocean of information, entertainment, and endless possibilities.

But it’s not without its annoyances like trackers and malwares that can infringe on your privacy and slow down your browsing experience.

Even worse, if you live in certain countries, there’s also a chance that your ISP is actively blocking your favorite websites.

That’s where AdGuard Home comes in. It’s network-wide software that blocks trackers, malwares, and other unwanted content directly from your home network.