Resolving Git hooks error: unable to unlink old ‘filename’ (permission denied)

This article will teach you how to use Git when you want to deploy your application. While there are many ways to use Git to deploy our application, this tutorial will focus on the one that is most straightforward. I assume you already know how to create and use a repository on your local machine.

I was following the tutorial to setup a Git server on Raspberry Pi1. Then I continued to setup automatic deployment with Git from above article 2.

The setup was going well, until I tried to commit new changes and then pushed it to the Pi server. I got a bunch of errors produced by post-receive hook script, similar like these:

remote: error: unable to unlink old 'filename' (Permission denied)

git-push-error-unlink Continue reading Resolving Git hooks error: unable to unlink old ‘filename’ (permission denied)

It’s so easy to connect Raspbian Lite to WiFi


This month, I’ve got a chance to try Raspberry Pi device. I’ve got the Pi 2 model B from Jakarta Notebook offline store in Semarang. I am going to make it as a home server (actually workspace server 😀 ). Right now, there’s a router here that is connected to internet. But unfortunately, I don’t have sufficient LAN cable to connect Pi to the router. So, I make use of a Ralink USB WiFi adapter for Pi to connect. And actually, set it up via command line is not hard as I thought.

Setting Up fcitx-mozc in Fedora 23 KDE

こんにちは。今回のテーマは『Fedora 23に日本語入力fcitx-mozcを導入する』です。最近はLinuxでの日本語入力としてfcitx-mozcの人気がジワジワ高まっているように感じます。

Recently, Mozc, Japanese input methode engine by Google become more popular, compared with Anthy, so does fcitx upon ibus. In the official repository of Fedora, there’s fcitx-anthy, but unfortunately, there’s no fcitx-mozc yet.

Here I will wrap up the workaround for those who want to use fcitx-mozc in Fedora 23. Be careful, that you take responsible of all risks that may happen, as it may lead to dependency hell. Basically, you are going to get favor from OpenSUSE as it has provided fcitx-mozc. You need 3 packages to be downloaded: fcitx-mozc, mozc, and mozc-gui-tools.

  1. Download those 3 packages from, select “more version” link, under Direct install button, there you can choose the package version and system architecture, whether 32 bit or 64 bit
  2. Remove ibus-mozc and mozc if already installed via command sudo dnf remove ibus-mozc mozc
  3. Install fcitx if it’s not installed yet, sudo dnf install fcitx kcm-fcitx
  4. Then install the previously downloaded packages via console. sudo dnf install fcitx-mozc.rpm fcitx-gui-tools.rpm mozc.rpm
  5. Once it successfully installed, you can set the default input method to fcitx-mozc via system settings.
    at the left list, you may have to uncheck the option “Only show the current language” to show Mozc and move to the right. Apply the settings and just relogin to Plasma to take effect and see the fcitx icon at the taskbar below.

via Fedora 23に日本語入力fcitx-mozcを導入する.

KDEConnect not Working in Fedora 23 KDE

I’ve just successfully connected KDE Connect in my Fedora 23 KDE to Android. Just before, I thought it didn’t work in Plasma 5 or broken in Fedora. Since it could not find the Android devices, although they have KDE Connect app installed. But actually, it’s just blocked by firewall config of Fedora.

According to KDE Wiki, the ports for kde-connect need to be opened, i.e 1714-1764. I’ve never thought that such essential part of the desktop environment would be blocked by firewall. So I had no idea to touch firewall config at all. It was until I found a discussion on Reddit about the same problem I had. A user pointing out about Fedora’s firewall that seems blocking kde-connect. But I could see the ports either TCP or UDP have been opened and listened in the firewall config. But then I found out that kde-connect was unchecked in the Services list.

It means that the firewall didn’t allow kde-connect to access the ports it needs. Then I just had to check it, typed password, and voila… my Android device has been found by kde-connect. So now, I can enjoy syncing Android to KDE and playing some stuffs it has.


QR Code Scanner with Qt Framework + OpenCV

I need a program for scanning QR code and processing the data. For this purpose, there are several libraries which can help saving my time for developing it. For instance, ZXing library, or ZBar. For web developers, there are also corresponding library for scanning QR code, that are both client side (JavaScript) and server side (PHP). Continue reading QR Code Scanner with Qt Framework + OpenCV

Settings for Nokia Asha 210 to Make SIP Call (in Asterisk PBX Network)

Above are gallery of screen captures of Nokia Asha 210 feature phone to configure SIP call in Asterisk PBX network. In other word, it is used for calling via VoIP network.

Making Kinetic Typography in Linux

Kinetic typography is an animation technique for moving text in certain ways. It became quite popular since a few years earlier. There are so many tutorials out there how to do kinetic typography. Almost all of them are created with After Effects (AE).

As a part of OpenSource community, I have once wondered, was there exist a similar program to do kinetic typography that runs on Linux? The answer is, yes of course, but not as powerful as AE. Actually, I’ve found Synfig Studio that has a close functionality to AE to produce kinetic typography. But, basically Synfig is a 2D animation software. Therefore, I cannot compare it with AE, after all.

TL;DR, this is a tutorial I’ve found in Youtube to do kinetic typography in Linux

And this is my rendered video