Assets precompile fails because of insufficient memory

Fix it without buying more RAM

Error Rails Ubuntu

Rails url helper does not respect "relative_url_root" configuration in mailer

Specify relative url for mailer using script_name

Error Rails ActionMailer Config

Letsencrypt "Invalid response" error during renewal due to http/https redirection

Make sure the authorization file can be accessed

Error Nginx SSL Letsencrypt

Define .ruby-version for all your app

To prevent wrong ruby version and gems being used in a multi-apps server

Error Ruby Version Passenger

False warning for Style/AndOr cop when used as chaining operation

"and" and "&&" does not always give equivalent result

Error Ruby Rubocop

Force HTTP header name lowercase

Walkaround for 3rd party server which is case-sensitive to HTTP header

Error Rails Httparty

Error installing mini_racer gem

In Ubuntu 12.04 or CentOS 6.x

Error Rails Bundle Gem

Whenever gem cron job bundle: command not found issue

Caused by path issue

Error Rails Cron job Crontab

Gradle build problem with unicode class and method name.

java.io.IOException: Failed to read zip file OR Error converting bytecode to dex

Error Gradle Android Unicode Obfuscation

Removing links added when printing bootstrap pages

This only happens for bootstrap before version 4

Error Bootstrap 3 Print

Upgrade to Nginx mainstream 1.11.0 to solve a few http2 related problem

Use Nginx 1.11.0 if you are using http2 feature extensively in your application

Error HTTP2 Nginx iOS AFNetworking