Fix capistrano errors: "no such file to load -- net/ssh/authentication/agent/socket" or "uninitialized constant Net::SSH::KnownHosts::SUPPORTED_TYPE"

For example if you use rvm and get this message:

ERROR:  Loading command: install (LoadError)
    no such file to load -- zlib
ERROR:  While executing gem ... (NameError)
    uninitialized constant Gem::Commands::InstallCommand

...

You are getting when connecting via SSH or deploying with Capistrano (which uses SSH):

Too many authentication failures for username

This is caused by having too many SSH keys added to your keyring or ssh-agent. Your ssh-agent will throw all...

I got this error after upgrading Ruby from 2.4.5 to 2.6.4 when I opened the Rails console - rails server still worked.

Running via Spring preloader in process 14679
Loading development environment (Rails 5.2.2.1)
Traceback (most recent call...

If you're on Ubuntu:

sudo apt-get install ruby-dev

On other platforms: Look for a package containing ruby header files. On Red Hat that's "ruby-devel" likely.

If you get this error (probably because you want to load some modules):

# modprobe xt_comment
FATAL: Could not load /lib/modules/3.2.0-40-generic/modules.dep: No such file or directory

The reason could be that apt-get autoremove al...

Today, I ran into trouble on a fairly fresh installed VM, running Ubuntu. I tried to bundle install and got this stacktrace:

Fetching gem metadata from https://rubygems.org/.Unfortunately, a fatal error has occurred. Please see the Bund...

While upgrading CarrierWave from version 0.11.x to 3.x, we encountered some very nasty fails. Below are the basic changes you need to perform and some behavior you may eventually run into when upgrading your application. This aims to save you some...

There is no reason to leave trailing whitespace characters in your project's files, so don't add any.

A git diff --check will tell you if there are any and you should not commit when you see them. So go ahead and switch your editor/IDE to autom...

This error occurs when passing an object instead of a string to Jasmine's describe():

# Bad
describe(HoverClass, function() { ... })

# Correct
describe('HoverClass', function() { ... })