Speeding up ssh session creation
Establishing a new SSH connection usually takes only a few seconds, but if you’re connecting to a server multiple times in succession the overhead starts to add up. If you do a lot of Git pushing and pulling or frequently need to SSH to a dev server, you’ve probably felt the pain of waiting for SSH to connect so you can get back to doing work.
Related cards:
Heads up: Deployment with newly generated SSH key (using ED25519) might fail
If you use a newer SSH key generated with the ED25519 algorithm instead of RSA (see Create a new SSH key pair), the deployment with Capistrano may fail with the following mes...
Capistrano: Speeding up asset compile during deploy
Remember How to skip Sprockets asset compile during Capistrano deployment and Automatically skipping asset compilation when assets have not changed? Turns out there is an even better way to speed up Capistran...
SSH: X-Forwarding
If you need to run a program on a remote machine (e.g. to your office PC) with a graphical UI (and you trust the remote machine), you can use SSH X-Forwarding. I sometimes use this to connect to a virtual machine installed on my...
Saving application objects in your session will come back to haunt you
If you save a non-standard object (not a String or Fixnum, etc) like the AwesomeClass from your application in the session of visitors be prepared that some time you will get this exception:
ActionController::SessionRestoreError: Session c...
Threads and processes in a Capybara/Selenium session
TLDR: This card explains which threads and processes interact with each other when you run a Selenium test with Capybara. This will help you understand "impossible" behavior of your tests.
When you run a Rack::Te...
How to fix "Too many authentic authentication failures" with SSH and/or Capistrano
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...
Manage ssh keys with Keychain
Keychain helps you to manage ssh and GPG keys in a convenient and secure manner. It acts as a frontend to ssh-agent and ssh add, but allows you to easily have one long running ssh-agent process per system, rather than the norm of one ssh-agent pe...
Events triggered by jQuery cannot be observed by native event listeners
jQuery has a function $.fn.trigger(). You can use it to dispatch an event on a jQuery object:
let $element = $('.foo')
$element.trigger('change')
A caveat is that such an event will be received by jQuery event listeners, but ...
Ruby on Rails » Keeping Up With The Joneses: Keeping Rails and its extensions up to date » Pathfinder Development
There are many wonderful things about Rails and the Rails ecosystem. A clean, well-lighted path for keeping all your extensions up to date is not one of them.
Find out your SSH key's fingerprint (e.g. to authenticate on GitHub)
If you want to know your public key's fingerprint, do this:
ssh-keygen -lf ~/.ssh/my.key.pub
This may be necessary to authenticate your key on GitHub because of [recent events](https://github.com/blog/1068-public-key-security-vulnerability-a...