Jun Yin injune1123

## keybase.md

      
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                injune1123
                / keybase.md
            
            
              Created
              October 2, 2018 23:15
            
              
                link Github with Keybase
              
          
    Keybase proof

I hereby claim:

I am injune1123 on github.
I am injune1123 (https://keybase.io/injune1123) on keybase.
I have a public key ASDTnw94BeOrfECmNpM7dSdWhJnx78S7pT5fJfmeb_I5GAo

To claim this, I am signing this object:

  
## Java Cheat Sheet
//check the version of JAVA
java -version

// Switch to JAVA 8 on macOS High Sierra and Mojave
$export JAVA_HOME=/Library/Java/JavaVirtualMachines/jdk1.8.0_161.jdk/Contents/Home/

## Git Command Cheat Sheet
Learning resources:
https://learngitbranching.js.org/

I stashed twice, what shall I do????!!!!
https://www.atlassian.com/git/tutorials/saving-changes/git-stash

$git stash list
$git stash apply stash@{n}

Switching remote URLs

## Postgresql Cheat Sheet
sudo su - postgres

create database #{DATABASE_NAME};


psql -U postgres

//list all dbs
postgres-# \l

## NPM Cheat Sheet
//fix ${NPM_TOKEN} error
get a new token from npm.org
add `export NPM_TOKEN="{token}` to `~/.bash_profile`

//test a single file using Jest and npm?
npm test -- SomeTestFileToRun

## My mysql Cheat Sheet
mysql -u root

show databases;
// the default databases
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| performance_schema |

## Apache Cheat Sheet

//

## Rails Cheatsheet
rvm use

bundle install

bundle exec rake db:migrate

bundle exec rake jobs:work

? after a funcion mean it returns a boolean

## My shortcut Cheatsheet
use Ctl+Alt+Up (sublime vertical select )

## My terminal tricks
//============
//iterm
//============
download iterm
cmd+D splits the window horizontally
cmd+shift+D splits the window vertically

//Open Toolbelt
Profiles, Command History, Notes
	//check the version of JAVA
	java -version

	// Switch to JAVA 8 on macOS High Sierra and Mojave
	$export JAVA_HOME=/Library/Java/JavaVirtualMachines/jdk1.8.0_161.jdk/Contents/Home/
	Learning resources:
	https://learngitbranching.js.org/

	I stashed twice, what shall I do????!!!!
	https://www.atlassian.com/git/tutorials/saving-changes/git-stash

	$git stash list
	$git stash apply stash@{n}

	Switching remote URLs
	sudo su - postgres

	create database #{DATABASE_NAME};


	psql -U postgres

	//list all dbs
	postgres-# \l
	//fix ${NPM_TOKEN} error
	get a new token from npm.org
	add `export NPM_TOKEN="{token}` to `~/.bash_profile`

	//test a single file using Jest and npm?
	npm test -- SomeTestFileToRun
	mysql -u root

	show databases;
	// the default databases
	+--------------------+
	\| Database \|
	+--------------------+
	\| information_schema \|
	\| mysql \|
	\| performance_schema \|
	rvm use

	bundle install

	bundle exec rake db:migrate

	bundle exec rake jobs:work

	? after a funcion mean it returns a boolean
	//============
	//iterm
	//============
	download iterm
	cmd+D splits the window horizontally
	cmd+shift+D splits the window vertically

	//Open Toolbelt
	Profiles, Command History, Notes