Recommended Applications for Your Ubuntu Desktop

If you like to use Ubuntu Desktop for your daily works, I recommend some good applications to improve your productivity and convenience. Currently, I use Ubuntu Desktop 18.04.

Adjust Brightness Icon. It is a simple application that add functionality to your Ubuntu to adjust brightness of your screen with four level of brightness by clicking its icon on the Taskbar. You can install this application through Ubuntu Software Center.
Gnome Tweaks. This application provides several options to configure your desktop and system appearance such as applying dark theme, changing fonts, adding startup application, etc. To use this tools, you can follow this instruction:
- In terminal run: > sudo apt install gnome-tweaks gnome-tweak-tool
- Then open the application by running: > gnome-tweaks
Pomodoro. It helps you to manage time according to the pomodoro technique. You can install this app through Ubuntu Software Center.
VLC. It is open source multimedia player with plenty of built-in tools for your music or videos.

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Configuring Swap Memory on Ubuntu Using Ansible

If we maintain a Linux machine with a low memory capacity while we are required to run an application with high memory consumption, enabling swap memory is an option. Ansible can be utilized as a helper tool to automate the creation of swap memory. A swap file can be allocated in the available storage of the machine. The swap file then can be assigned as a swap memory. Firstly, we should prepare the inventory file. The following snippet is an example, you must provide your own configuration. [server] 192.168.1.2 [server:vars] ansible_user=root ansible_ssh_private_key_file=~/.ssh/id_rsa Secondly, we need to prepare the task file that contains not only the tasks but also some variables and connection information. For instance, we set /swapfile as the name of our swap file. We also set the swap memory size to 2GB and the swappiness level to 60. - hosts: server become: true vars: swap_vars: size: 2G swappiness: 60 For simplicity, we only check the exi

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NestJS is a framework for developing Node.js-based applications. It provides an additional abstraction layer on top of Express or other HTTP handlers and gives developers a stable foundation to build applications with structured procedures. Meanwhile, Mongoose is a schema modeling helper based on Node.js for MongoDB. There are several main steps to be performed for allowing our program to handle MongoDB records. First, we need to add the dependencies which are @nestjs/mongoose , mongoose , and @types/mongoose . Then, we need to define the connection configuration on the application module decorator. import { MongooseModule } from '@nestjs/mongoose'; @Module({ imports: [ MongooseModule.forRoot('mongodb://localhost:27017/mydb'), ], controllers: [AppController], providers: [AppService], }) Next, we create the schema definition using helpers provided by NestJS and Mongoose. The following snippet is an example with a declaration of index setting and an o

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