Eric Yan ericxyan

String

< /dev/null is used to instantly send EOF to the program, so that it doesn't wait for input (/dev/null, the null device, is a special file that discards all data written to it, but reports that the write operation succeeded, and provides no data to any process that reads from it, yielding EOF immediately). & is a special type of command separator used to background the preceding process.

nohup myscript.sh >myscript.log 2>&1 </dev/null &
# |               ^^^^^^^^^^^^^ ^^^^ ^^^^^^^^^^ ^
# |                    |           |      |     run in background
# |                    |           |      |     
# |                    |           |   don't expect input
# |                    |           |   
# | | redirect stderr to stdout

Set Tab

# vim.wikia.com/wiki/Converting_tabs_to_spaces
:set tabstop=4 # set tabs to display as four spaces
:set expandtab # apply to all new tab
:set shiftwidth=4 # change tab space to 4
:retab

Install Java 8

sudo add-apt-repository -y ppa:webupd8team/java
sudo apt-get update
sudo apt-get -y install oracle-java8-installer

Start Elasticsearch on boot up:

sudo update-rc.d elasticsearch defaults 95 10

C Tool Kits

Maven

POM(Project Object Model):
pom.xml:
- Maven project structure and contents are declared in an pom.xml file.
- Resides in the base directory of the project
- mandatory fields: groupId, artifactId, version
```
<project xmlns="http://maven.apache.org/POM/4.0.0"
   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
```

xsi:schemaLocation="http://maven.apache.org/POM/4.0.0

	Left_Btn = 1
	Mouse_M = 2
	Right_Btn = 3

	Mouse_G9 = 9

	Mouse_LB = 5
	Mouse_RB = 4

	Skills_wall = {

	const $ = cheerio.load(pm.response.text())

	const ele = $('form input[type="hidden"]');

	const csrf_token = ele.val();

	console.log(csrf_token);

	const loginRequest = {
	url: 'https://a0f2a3f3-f800-40ba-8578-248561f0b0f8.mock.pstmn.io/login',

	catNames=[]
	while True:
	print('Enter the name of cat'+str(len(catNames))+'(Or enter nothing to stop.):')
	name=input()
	if name=="":
	break
	catNames=catNames+[name] #1st concatenation
	print('The cat names are:')
	for name in catNames:
	print(''+name)