[Ubuntu] Add or remove a systemctl (systemd) service

An example to add or remove a service on system with systemd

[Docker] Allow non-root user to use docker command

Allow non-root user run docker without sudo prefix:

# replace $USER_NAME with real username 
sudo usermod -aG docker $USER_NAME

Thêm một ổ đĩa mới vào hệ thống Linux (Ubuntu)

Bài viết tóm tắt các bước thêm một disk mới vào máy ảo (virtual machine - VM) chạy Ubuntu, việc thực hiện này không cần reboot hệ thống.

Google Chrome Browser on Ubuntu – Fix some GPU problem

Running Google Chrome Browser on Ubuntu may have some problem with GPU-acceleration, especially when you are using a NVIDIA GPU.

Some problems I have so far:

  • CheckerImaging: Disabled
  • Native GpuMemoryBuffers: Software only. Hardware acceleration disabled
  • Rasterization: Software only. Hardware acceleration disabled

Fix XMind slow / lag on Ubuntu 16.04

XMind is the most professional and popular mind mapping tool. Millions of people use XMind to clarify thinking, manage complex information, run brainstorming …

On Ubuntu 16.04 is have a bug that make the application lag and slow (read here). This article help you how to fix it.

Switch Input method global in Ubuntu

When using Ubuntu, switching between input method so uncomfortable. I use English as default and Unikey (fcitx-unikey) for Vietnamese. You can switch between input method by the hotkey (as my setting is Ctrl + Space), the problem is this hotkey is not working if you are not in the input area.

How to stop using TLS-SNI-01 with Certbot / Ubuntu / Nginx

Source: https://community.letsencrypt.org/t/how-to-stop-using-tls-sni-01-with-certbot/83210