How to fix RCurl installation error xml2-config: Command not found

Problem:

While trying to install RCurl using

BiocManager::install("RCurl")

you see the following error message:

> BiocManager::install("RCurl")
/bin/bash: Zeile 1: xml2-config: Befehl nicht gefunden
/bin/bash: Zeile 1: xml2-config: Befehl nicht gefunden

Solution:

You need to install the libxml2 development headers which include the xml2-config executable.

On Ubuntu, you can install it using

sudo apt -y install libxml2-dev