Install HAProxy on Ubuntu 20.04

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 $ sudo apt install haproxy

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$ sudo apt install --no-install-recommends software-properties-common

$ sudo add-apt-repository ppa:vbernat/haproxy-2.4 -y

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$ sudo apt install haproxy=2.4.\*

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$ haproxy -v

HAProxy version 2.4.2-1ppa1~focal 2021/07/07 - https://haproxy.org/
Status: long-term supported branch - will stop receiving fixes around Q2 2026.
Known bugs: http://www.haproxy.org/bugs/bugs-2.4.2.html
Running on: Linux 5.4.0-80-generic #90-Ubuntu SMP Fri Jul 9 22:49:44 UTC 2021 x86_64

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$ sudo apt update && sudo apt upgrade -y