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sudo lsof -i :3000
kill -9 <PID>

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	<build>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
				<configuration>
					<excludes>
						<exclude>
							<groupId>org.projectlombok</groupId>

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1- Create the directory

mkdir -p /etc/systemd/system/docker.service.d

2- Create the file

vim /etc/systemd/system/docker.service.d/http-proxy.conf

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Get info about cluster

kubectl cluster-info

Get nodes information

kubectl get nodes

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Nginx features

• Web Server
• Load Balancer
• Reverse Proxy
• Monitoring and Management

HTTP Codes

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List of shells on machine

cat /etc/shells

write and append to file

echo test > file.text
echo test2 >> file.txt

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Best file system for Mongodb

XFS is a great choice as a filesystem, as it can perform snapshot backups.

Document Max (best practice) Size

Respect the maximum document size of 16 MB

MongoDB JIRA Address

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db = db.getSiblingDB('dbname');

insertBulk = function() {
	
	var bulk = db.books.initializeUnorderedBulkOp(); // or we can use db.books.initializeOrderedBulkOp();
	
  for(loop=0;loop<1000;loop++) {
	   bulk.insert({name: "Moon"});			
	}
	

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db = db.getSiblingDB('dilmachi');
insertBulk = function() {
	
	var bulk = db.books.initializeOrderedBulkOp();
	bulk.find({name: 'Moon'}).update({$set: {price: 300}});
	bulk.execute();
}

insertBulk();

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Create user with sudo access

sudo adduser <username>
sudo usermod -aG sudo <username>
su — <username>

Change sshd configs