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{
  "token": "[token]",
  "job": "notifySlack",
  "ref": "refs/pull/4/merge",
  "sha": "[shad]",
  "repository": "colbyfayock/demo-github-actions",
  "repository_owner": "colbyfayock",
  "repositoryUrl": "git://github.com/colbyfayock/demo-github-actions.git",
  "run_id": 120667610,
  "run_number": "2",

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What to Expect and Tips

• 45-minute systems interview, focus on responding to real world problems with an unhealthy service, such as a web server or database. The interview will start off at a high level troubleshooting a likely scenario, dig deeper to find the cause and some possible solutions for it. The goal is to probe your knowledge of systems at scale and under load, so keep in mind the challenges of the Facebook environment.
• Focus on things such as tooling, memory management and unix process lifecycle.

Systems

More specifically, linux troubleshooting and debugging. Understanding things like memory, io, cpu, shell, memory etc. would be pretty helpful. Knowing how to actually write a unix shell would also be a good idea. What tools might you use to debug something? On another note, this interview will likely push your boundaries of what you know (and how to implement it).

Design/Architecture 

Interview is all about taking an ambiguous question of how you might build a system and letting

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Create Root CA (Done once)

Create Root Key

Attention: this is the key used to sign the certificate requests, anyone holding this can sign certificates on your behalf. So keep it in a safe place!

openssl genrsa -des3 -out rootCA.key 4096

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=Navigating=
    visit('/projects')
    visit(post_comments_path(post))

=Clicking links and buttons=
    click_link('id-of-link')
    click_link('Link Text')
    click_button('Save')
    click('Link Text') # Click either a link or a button
    click('Button Value')

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tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname

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tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname