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How to add an encrypted hard disk

Add an encrypted hard disk to an existing Ubuntu system.

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SysOps

How to write an operating system to microSD card using graphical user interface

Write an operating system to microSD card using Raspberry Pi Imaging Utility.

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SysOps

How to deal with overlapping LVM names

Today, I will connect the secondary encrypted hard disk from the previous Ubuntu installation to copy personal data, so there will be a problem with overlapping LVM names.

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SysOps

How to suppress SSH banner

Suppress SSH banner when executing ad-hoc commands.

Categories
SecOps

How to check if the certificate matches DNS name or IP address

Check if the certificate matches DNS name or IP address

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SysOps

How to export every LXD instance at once

Export every LXD instance at once.

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SysOps

How to use lightweight compressed cache for swap pages

Configure a lightweight compressed cache for swap pages to mitigate the performance impact of swapping on your desktop.

Categories
SecOps

How to create a multi-domain SSL certificate without common name

Create a multi-domain SSL certificate without a common name.

Categories
SecOps

How to generate a base64-encoded secret

Use the OpenSSL utility to generate a base64-encoded secret.

Categories
SysOps

How to list file names and their contents

Use basic Linux utilities to list file names and their contents.