# Agile Web Development with Rails 6: Typo - repeated libreadline-dev in Installing System Software section (PDF p. 12)

**URL:** <https://forum.devtalk.com/t/agile-web-development-with-rails-6-typo-repeated-libreadline-dev-in-installing-system-software-section-pdf-p-12/9060>\
**Category:** PragProg Customers\
**Tags:** book-agile-web-development-with-rails-6, errata\
**Created:** [24 April 2021 23:04 UTC](https://forum.devtalk.com/t/agile-web-development-with-rails-6-typo-repeated-libreadline-dev-in-installing-system-software-section-pdf-p-12/9060 "2021-04-24T23:04:07Z")\
**Posts on this page:** 1\
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**Author:** ![davetron5000](https://forum.devtalk.com/user_avatar/forum.devtalk.com/davetron5000/32/5597_2.png) [@davetron5000](https://forum.devtalk.com/u/davetron5000)\
**Post date:** [25 April 2021 21:57 UTC](https://forum.devtalk.com/t/agile-web-development-with-rails-6-typo-repeated-libreadline-dev-in-installing-system-software-section-pdf-p-12/9060/2 "2021-04-25T21:57:18Z")

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Thanks for catching that! I don’t think it will mess anything up, but will mark this as errata for when we next make a new editiong.

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