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SysOps

How to create VLAN interface using the ip utility

I have already described how to create VLAN interface, but things have changed over time, so I decided to update the know-how.

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How to get RabbitMQ uptime

Get and display RabbitMQ uptime measured in seconds using three different methods.

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SysOps

How to install RabbitMQ message broker

Install RabbitMQ message broker to queue and exchange messages.

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How to convert units using command-line

Use dedicated command-line utility to convert various units to different measurement systems.

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SysOps

How to parse Debian package information

Use to drctl-tools to parse Debian package information using the Debian control file format (the dctrl format).

How to deal with "repository is not valid yet" error

What does “Release file for […] is not valid yet (invalid for another […]). Updates for this repository will not be applied.” error mean?

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How to create persistent sysctl configuration

Create persistent sysctl configuration using standard system utilities.

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How to fix fusermount – executable file not found

Quickly fix fusermount: exec: “fusermount”: executable file not found in $PATH by installing missing Filesystem in Userspace package.