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Terraform

• https://www.terraform.io/docs/commands/refresh.html
• https://www.terraform.io/docs/providers/aws/d/iam_policy_document.html
• terraform state show

uninstall

brew uninstall --force terraform
brew cleanup -s terraform

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JAVA Cheatsheet

Version

Mac

https://stackoverflow.com/questions/21964709/how-to-set-or-change-the-default-java-jdk-version-on-os-x

Show what jdks are installed:

/usr/libexec/java_home -V

Add the following to .bash_profile to pin a default java version to use.

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Mac Commands

• Force Quit dialog: cmd+opt+esc

Terminal

https://support.apple.com/en-au/guide/terminal/trmlshtcts/mac

• New tab: Command-T
• Split window into two panes: Command-D
• Close split pane: Shift-Command-D

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Maven commands

mvn --version
mvn clean compile
mvn -f $APP_REPO_DIR/java/pom.xml clean compile

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Chrome

Stop redirect from http to https

1. Delete domain security policies chrome://net-internals/#hsts Enter domain name under "Delete domain security policies" and press the Delete button.
2. Clear browsing data Settings > Show advanced settings… > Privacy > Clear browsing data https://superuser.com/q/565409/273113

stop redirect from http to https

chrome://net-internals/#hsts

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Tmux

Ctrl+b = C-b

Ctrl+b " = Ctrl+b release, then press shift + '.

Splite pane

Ctrl+b " — split pane vertically.

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Apache Web Server

Ubuntu

apt-get install apache2

Suppress warning message Could not reliably determine the server's fully qualified domain name

Add at the bottom of /etc/apache2/apache2.conf

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Jquery

https://www.w3schools.com/jquery/jquery_examples.asp

<script
  src="https://code.jquery.com/jquery-3.3.1.min.js"
  integrity="sha256-FgpCb/KJQlLNfOu91ta32o/NMZxltwRo8QtmkMRdAu8="
  crossorigin="anonymous"></script>

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Regular expression cheatsheet

Digits

^     : Start anchor
[0-9] : Character class to match one of the 10 digits
{1,6} : Range quantifier. Minimum 1 repetition and maximum 6.
$     : End anchor

\d can be used as an equivalent of [0-9], i.e. ^\d{1,6}$

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Linux Command Cheatsheet

Linux Keyboard shortcuts

open terminal: Ctrl+Alt+T

Ctrl + C is used to kill a process with signal SIGINT , in other words it is a polite kill .

Ctrl + Z is used to suspend a process by sending it the signal SIGTSTP , which is like a sleep signal, that can be undone and the process can be resumed again.