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Understanding bashrc vs .bash_profile vs .zshrc

bash unix shell profile zsh

When delving into the world of command-line interfaces (CLI), you might have encountered files like .bashrc, .bash_profile, and .zshrc. But what are they, and why are they so crucial for developers and system administrators? Let's unravel this mystery.

2023-11-18

1590

Enhancing Application Security with OAuth 2.0 and OpenID Connect

access connect oauth openid security

Enhancing Application Security with OAuth 2.0 and OpenID Connect

2023-11-18

1720

TLS 1.3: Enhanced Security, Faster Connections

client message security server tls

In today's digital landscape, the security and speed of data transmissions are crucial. In this regard, the Transport Layer Security (TLS) protocol plays a pivotal role. Here, we'll dive deep into the new and improved TLS 1.3 protocol, with an emphasis on its handshake process, which has undergone substantial improvements in terms of speed and security compared to its predecessor, TLS 1.2.

2023-11-18

1650

TLS 1.3: Enhanced Security, Faster Connections

client message security server tls

In today's digital landscape, the security and speed of data transmissions are crucial. In this regard, the Transport Layer Security (TLS) protocol plays a pivotal role. Here, we'll dive deep into the new and improved TLS 1.3 protocol, with an emphasis on its handshake process, which has undergone substantial improvements in terms of speed and security compared to its predecessor, TLS 1.2.

2023-11-18

1740

Disk I/O issues: Understanding and fixing them to boost system performance

boost command disk performance storage

Disk I/O and space usage issues are common causes of performance degradation in computing systems. Low system speeds can directly affect its ability to retrieve and store information on the disk.

2023-11-18

1580

Unleashing the Power of Storage in Kubernetes: A Comprehensive Guide

kubernetes backup disk resources storage

2023-11-18

950

The Null Value Header Bug: Why Clients Didn't Receive Packets in Spring Gateway

spring bug gateway header null

This problem surfaced in our API gateway service, which we built using Spring Gateway. The service handles exceptions by implementing the ErrorWebExceptionHandler interface, returning processed exception details to the client and adding some header information. Everything was functioning well until one day, after a code merge, issues began to sporadically appear. Here's what we observed:

2023-11-18

1640

Inside Linux Networking: A Code-Level Exploration of IPVS and IPTABLES

linux code iptables networking packet

2023-11-18

1400

What's the Difference Between Blocking vs Non-Blocking and Sync vs Async?

async between blocking difference std

During application development, we often confront terms like "Blocking," "Non-blocking," "Synchronous," and "Asynchronous." It's a common misconception to view these as synonymous. In reality, they represent distinct, albeit intertwined, concepts.

2023-11-18

2250

Kubernetes Networking: From Basics to Best Practices

kubernetes network networking plugins service

2023-11-18

1090

How Docker Containers Work – Explained for Beginners

容器镜像服务 container containers this virtual

A container is a lightweight, standalone, and executable software package that includes everything needed to run a piece of software.

2023-11-18

1610

79. 单词搜索

int word 数组搜索字符串

Given an m x n grid of characters board and a string word, return true if word exists in the grid.

2023-11-18

1480

301. 删除无效的括号

return string 遍历递归字符串

Given a string s that contains parentheses and letters, remove the minimum number of invalid parentheses to make the input string valid.

2023-11-18

1320

410. 分割数组的最大值

dp int 变量动态规划数组

Given an array nums which consists of non-negative integers and an integer m, you can split the array into m non-empty continuous subarrays.

2023-11-18

1110

用Go语言实现WebSSH远程连接

go 服务器函数连接浏览器

WebSSH是一种通过Web浏览器远程连接到SSH服务器的技术。它允许用户在不需要本地SSH客户端的情况下，通过Web浏览器连接到远程服务器并执行命令。WebSSH的实现原理是通过WebSocket协议在Web浏览器和SSH服务器之间建立一个双向通信通道，使得用户可以在Web浏览器中输入命令并将其发送到SSH服务器，同时也可以接收SSH服务器的输出并在Web浏览器中显示。

2023-11-18

7300

服务网格化 -- Linkerd和Istio

服务网格 istio 服务架构通信

服务网格化是一种新兴的架构模式，它旨在解决微服务架构中的一些常见问题，例如服务发现、负载均衡、故障恢复、安全性等。服务网格化通过将这些功能从应用程序中分离出来，并将它们放在一个专门的网络层中，从而使得应用程序可以更加专注于业务逻辑，而不必担心这些底层的问题。

2023-11-18

2500

Deep Dive into Elasticsearch's Distributed Architecture

architecture data distributed elasticsearch search

In the digital age, data stands as a crucial asset for enterprises. The effective storage, retrieval, and analysis of this data are among the primary challenges faced by businesses today. Elasticsearch, commonly referred to as "ES", is a robust, scalable, and real-time search and analytics engine, proving to be an indispensable component in the contemporary data pipeline. With a wide range of applications, from full-text search and logging to more complex use cases such as machine learning and graph analysis, Elasticsearch stands out. This blog post provides a comprehensive insight into Elasticsearch's distributed architecture, touching upon its main components, read-write operations, indexing principles, and application scenarios.

2023-11-18

1660

Iptables NAT：实现网络中转

nat iptables 互联网配置网络

在本文中，我们将深入解析iptables NAT（网络地址转换）的功能，以及如何使用它进行网络中转。我们会详细解释NAT中使用的PREROUTING、POSTROUTING和OUTPUT链的含义，介绍如何配置DNAT（目标网络地址转换）和SNAT（源网络地址转换），并在内网场景中演示这些概念。最后，我们将阐述如何持久化iptables配置，以保证在重启后仍然生效。

2023-11-18

2K0

网络ACL与安全组：云计算中的网络安全

网络安全安全云计算 acl 网络

在云计算环境中，网络安全是至关重要的。为了保护您的资源和数据，云服务提供商提供了多种网络安全控制手段，其中最常见的是网络访问控制列表（ACL）和安全组。本文将详细介绍网络ACL和安全组的概念、实现原理以及架构图。最后，我们将对比常见的防火墙方案，包括WAF、防火墙、VPN、ACL和安全组。

2023-11-18

7980

CAP, BASE, Paxos, and Raft: Key Concepts in Distributed Systems

raft algorithm distributed key theory

When discussing the design principles underpinning distributed systems, the CAP theorem and BASE theory serve as essential foundations that warrant our understanding.

2023-11-18

2020

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