28 lines
896 B
Markdown
28 lines
896 B
Markdown
---
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title: FAQs
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---
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# Frequently Asked Questions
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## How do I build my local copy of the Ruby source code documentation?
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```shell
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cd docs
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make ruby-doc
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```
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Then open `.static/ruby-doc/index.html` in the `docs` directory and browse the Ruby documentation
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## How do I fix the Error `role "ec2-user" does not exist` on an AWS instance?
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After installing and configuring PostgreSQL on an AWS EC2 (or AWS Cloud9) instance and running `bin/setup`, this error could occur.
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To fix it, run the following two commands in a terminal (assuming your PostgreSQL user is named **postgres**):
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```
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sudo -u postgres createuser -s ec2-user
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sudo -u postgres createdb ec2-user
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```
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The first command creates the user **ec2-user** and the second one creates the database for this user because every user needs its database.
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Even if the first command fails, run the second command to create the missing database.
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