today's howtos

• How to create Cloudwatch alarms for a Lambda Function on AWS

  There are various invocation metrics, performance metrics, and concurrency metrics available for Lambda functions in Cloudwatch to monitor. Invocation metrics are the outcome of an invocation and binary in nature, performance details about a single invocation are provided by Performance metrics.

• How to Install SQLite and SQLite Browser on Ubuntu 20.04

  Sqlite is a lightweight but feature-rich database management system that is widely used in embedded systems like mobile devices. It is basically a relative database management system used for storing structured data in large tables. Other Major Database Management Systems in this series include Microsoft’s SQL Server, MySQL, PostgreSQL, IBM’s DB2, and Oracle Database. Being open-source, SQLite source code can be modified as per the requirement of developers. It is also available for free use in both commercial and non-commercial projects. SQLite runs without the need for a separate server process. Since no server is required for setting up SQLite, an SQLite database instance can be created just like opening a file. It is a C library that has direct access to its stored files. The whole database system is contained in a single library. It is integrated directly into the host program. It is fully compliant with ACID. It uses minimum system resources. With the SQLite browser, we can directly manipulate the files in the SQLite database. It is open source. DB Browser is an example of an SQLite browser. It can be used for creating and editing database files. With the visual interface of a DB browser, you do not need to remember SQL commands. This feature makes it more flexible for new users as well as for developers.

• bullseye: doveadm as unprivileged user with dovecot ssl config

• How to install JetBrains Rider on Linux

  In this guide, we’ll show you how to download and install JetBrains Rider on Linux. However, before we begin, please note that you will need to create a JetBrains account. To do that, head over to their website.

• How to use the Nano text editor on Linux

  There are many different text editors on Linux, and the community is quite passionate about this subject. However, one text editor stands out from the rest as the easiest to use, especially for beginners. That text editor is Nano.

• How to install the Brave Browser on Deepin 20.2

  In this video, we are looking at how to install the Brave Browser on Deepin 20.2.

• How to install Firefox ESR on a Chromebook in 2021

  Today we are looking at how to install Firefox ESR (Extended Release Cycle) on a Chromebook. Please follow the video/audio guide as a tutorial where we explain the process step by step and use the commands below.

Kernel: HiSilicon and AMD Energy Monitoring Driver

• CPU Cluster Scheduler Continues To Be Worked On For Linux With Promising Results

  HiSilicon engineers continue working on a cluster scheduler that could help the performance of certain x86 and ARM platforms on Linux. HiSilicon has been pursuing this "cluster scheduler" for the Linux kernel in order to enhance the performance of the Kunpeng 920 ARM server chip that has six or eight clusters per NUMA node and each cluster being comprised of four CPU cores with shared L3 cache access among the clusters. But there is also the possibility of this scheduler helping some x86 hardware too, like Intel's Jacobsville is noted for its clusters of Atom cores. The HiSilicon Linux kernel work now up to its sixth round of patches is for exposing this topology and having a CPU scheduler to properly/efficiently deal with the layout. The goal with the scheduler is for spreading unrelated tasks among the multiple clusters to reduce contention and then to also gather related tasks within a cluster for improving cache affinity.

• AMD Energy Monitoring Driver Slated To Be Removed From The Linux Kernel - Phoronix

  As a surprise and big disappointment, the "amd_energy" driver that exposes AMD EPYC server CPU energy monitoring metrics under Linux for being able to calculate the per-core and package power consumption and more is now set to be removed from the mainline Linux kernel. The removal of this driver sadly isn't for a case like it's being replaced by some superior solution but rather a disagreement in the exposing of the energy data. Last year as a result of the PLATYPUS power attack Linux restricted access to such data to root/privileged users.

Librem 14 First Boot

The Librem 14 supports our Pureboot bundle. This includes software based on Heads and Coreboot and a hardware security device called a Librem key. It’s a compelling way to verify your OS has not been tampered with. While most GNU/Linux distros can be installed on the Librem 14, the two supported OSs are PureOS 10 and QubesOS. PureOS 10 code name Byzantium is our flagship OS with security and convenience at its core. QubesOS is a bit less convenient but adds extra software security for those that need it.