Categories
SysOps

How to use Nginx reverse proxy to limit external calls inside web-browser

Use Nginx reverse proxy to add Content-Security-Policy header and disable phoning home or external analytics inside web-browser.

Categories
SysOps

How to dry-run CentOS upgrade process

Use tsflags plugin to test upgrade process before executing it.

Categories
SysOps

How to extend RandR valid modes for an output

Using passive adapters to connect DisplayPort output to HDMI or DVI input is problematic with wide-screen monitors as these adapters supports a maximum resolution of 1920×1200 at 60Hz. This issue can be alleviated by adding a specific mode to the set of valid output modes.

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Uncategorized

How to add an encrypted hard disk

Add an encrypted hard disk to an existing Ubuntu system.

Categories
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.

Categories
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.

Categories
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

Categories
SysOps

How to export every LXD instance at once

Export every LXD instance at once.

Categories
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.