Curated list of messaging and collaboration solutions (2021)

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Introduction about messaging and collaboration solutions

Slack is used by many enterprises and open source projects, like CNCF, Kubernetes, Istio, Rancher and etc. Besides that, many communities use it. In this article, we are going to explore some of the chat and collaboration solutions.

Table: Curated list of messaging and collaboration solutions

Name License and pricing model Advantages Cons and pain points
  • Proprietary. Free plans is available but no self hosting
  • Paid plans are …
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Trying out the .Quest TLD domain and domains for sale

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The .Quest TLD domain, together with, .Beauty, .Hair, .Skin, and .Makeup are available for public to purchase. To me, it seems the news was not advertised a lot (I mainly use Twitter). While browsing for some new domains I discovered these TLD are already on sale. These domains are under the operation of Generation.XYZ LLC. They have a blog about it.

The "Quest" means pursuing, searching, or an attempt to achieve something or a …

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A short experiment with Transparent Huge Pages (THP) on Linux

Some books

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Introduction of THP

A typical page in Linux memory management system is 4KB. To enhance the efficiency of allocating large amount of memory pages, the OS could make use of huge memory pages. Instead of using 4KB as a page, the OS could allocate a bigger block of page size in 2MB or 1GB. To use huge memory pages, the OS need to be configured so that the memory is preserved or allocated. Refer to the …

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Curated list of open source and low-cost wiki software (2020)

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Introduction about wiki software

I liked using Atlassian Confluence as wiki or knowledge management application. However, Atlassian had announced that the standalone server version would be gone in 2021 February. Also, there would be a price increase of all the existing data center version of Atlassian software.

So, let us look at other alternatives. In this article, I would briefly describe several open source and low-cost wiki and knowledge management software. We would have a summary …

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Curated list of open source and low-cost bug and issue tracking software (2020)

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Edit 1: There are changes for OTRS in 2021. On 1 Jan 2021, OTRS 6 community edition would not have new security updates. Also, the GitHub repository for OTRS 6 community is archived. So, there is no official support for OTRS 6 community edition any more.

There are two forks that I am aware at the moment: Znuny and Otobo.

Introduction about bug and issue tracking software

I had to admit I liked Atlassian Jira as …

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SSH public key authentication could bypass your security (PAM) policy

Some books

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Even after using Linux for years, you would always learn something new everyday. In this short article, I would talk about how SSH public key authentication could bypass security policy.

Let's start with pluggable authentication module (PAM). By using Linux PAM, the system could use modules to enhance the security of a system. For example, PAM could setup security policy that a password has to meet certain length and complexity. Another use case of the PAM …

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