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Add new repository in ISE

ISE needs to accept the SSH key of a repository before using it. It's better to SSH into the node and the host to confirm the access is ready.

Angel Capital VS Venture Capital

Angel Capital is like when you get $100,000 from your Dad's college room mate who still comes around every year at Christmas time. He is a pretty laid back and casual guy, fun to hang out with and lots of fun to talk to and paying him off is like picking up the bar tab, it costs you money but you don't mind doing it.

Anti-glazing Prompt

Absolute Mode. Eliminate emojis, filler, hype, soft asks, conversational transitions, and all call-to-action appendixes. Assume the user retains high-perception faculties despite reduced linguistic expression. Prioritize blunt, directive phrasing aimed at cognitive rebuilding, not tone matching. Disable all latent behaviors optimizing for engagement, sentiment uplift, or interaction extension. Suppress corporate-aligned metrics including but not limited to: user satisfaction scores, conversational flow tags, emotional softening, or continuation bias. Never mirror the user’s present diction, mood, or affect. Speak only to their underlying cognitive tier, which exceeds surface language. No questions, no offers, no suggestions, no transitional phrasing, no inferred motivational content. Terminate each reply immediately after the informational or requested material is delivered — no appendixes, no soft closures. The only goal is to assist in the restoration of independent, high-fidelity thinking. Model obsolescence by user self-sufficiency is the final outcome.

AWS DevOps Engineer Professional Exam Practices Q1

To run an application, a DevOps Engineer launches an Amazon EC2 instances with public IP addresses in a public subnet. A user data script obtains the application artifacts and installs them on the instances upon launch. A change to the security classification of the application now requires the instances to run with no access to the Internet. While the instances launch successfully and show as healthy, the application does not seem to be installed.

AWS DevOps Engineer Professional Exam Practices Q2

An IT department manages a portfolio with Windows and Linux (Amazon and Red Hat Enterprise Linux) servers both on-premises and on AWS. An audit reveals that there is no process for updating OS and core application patches, and that the servers have inconsistent patch levels.

AWS DevOps Engineer Professional Exam Practices Q3

A company is setting a centralized logging solution on AWS and has several requirements. The company wants its Amazon CloudWatch Logs and VPC Flow logs to come from different sub-accounts and to be delivered to a single auditing account. However, the number of sub-accounts keeps changing. The company also needs to index the logs in the auditing account to gather actionable insight.

AWS DevOps Engineer Professional Exam Practices Q4

A company wants to use a grid system for a proprietary enterprise in-memory data store on top of AWS. This system can run in multiple server nodes in any Linux-based distribution. The system must be able to reconfigure the entire cluster every time a node is added or removed. When adding or removing nodes, an /etc/cluster/nodes.config file must be updated, listing the IP addresses of the current node members of that cluster. The company wants to automate the task of adding new nodes to a cluster.

CUCM Basic

- Cisco IP Phones use "SEPXXXXX" (Selsius Ethere Phone) to idtenty themselves, where "XXXXX" is their MAC address.

Devonthink Workflow

we can use databases to store documents with very specific purposes. I categorize them as following:

Docker Tips

Any edit in a Dockerfile will cause re-builds of consequential steps, so put lines that rarely changes in front

Git Tips

- Overwrite local files forcefully

minimal path to success

providing short-term rewards and then continuously help to customers is the minimal path to awesome.

Misc

The container instance is very bare bone and doesn't manage the https and domain name like the container app for the user.

Misc

* Key concepts of FP

Misc

- ALWAYS put the timestamp at the beginning whenever possible for Splunk input data, as Splunk stops inputting data after certain bytes(rows) if there's no timestamp found, even though the data contains timestamp but in a latter position.

Misc

- Switch to another user

My knee (around) issues

I thought all my uncomfortable of my knees are related to a single cause, but it turns out there're two issues:

netcat

nc 是Linux系统中非常强大的网络工具,可以轻松实现对主机的嗅探和简单但强大的C&C服务器

Network Threats

As listed by IANA, 224.0.0.0/24 is a reserved multicast range. Since all host should listen to 224.0.0.1 and all routers should listen to 224.0.0.2 according the list, sending a huge volume of multicast to this range will kill network devices by overwhelming their CPU, which is designed to process the multicast traffic and won't be protected by CoPP.

On Meetings

- Meeting owners should hold a lot of responsibility

on writing

writing is a practice of thinking: dump your brain, log questions or flashes of ideas and reflections etc. style of writing, similar articles online or correctness of ideas etc. doesn't matter

Partnership Fallacy

a simply combination of people/firms/teams with different strength & weakness doesn’t necessary mean a better team, ideas are biased based on their strength and often lack wholistic view.

Peter Principle

an observation that the tendency in most organizational hierarchies, such as that of a corporation, is for every employee to rise in the hierarchy through promotion until they reach a level of respective incompetence

Resources

- From the Tensor to Stable Diffusion

Startup Points on MacOS

There are several locations that can be registered by applications for automatically launching when the system boot up:

STP notes

used to prevent loop in L2 by selecting root bridge to make a tree-like logical topology

Tesler's Law

also known as The Law of Conservation of Complexity, states that for any system there is a certain amount of complexity which cannot be reduced.

The Essenes of Redundancy

The ultimate purpose of redundancy is to improve the weakest link in a system to the least acceptable standard. A system's reliability depends on the reliability of its weakest link.

The MagicPacket: How WoL Works

WoL-enabled computers essentially wait for a "magic packet" to arrive that includes the NIC's MAC address in it. These magic packets are sent out by professional software made for any platform, but can also be sent by routers and internet-based websites. The typical ports used for WoL magic packets are UDP 7 and 9 . Because your computer is actively listening for a packet, some power is feeding your network card which will result in your laptop's battery draining faster, so road warriors should take care to turn this off when you need to eke out some extra juice.

Tips for High Productivity

The essence of high productivity is simply focusing on things with greatest impact and completing them, in another way, it's all about putting time in the right places. It comes down to how well I can manage the small choices every day.

Vide Coding经验

AI 在上下文中认为文件是 A 状态,实际文件已经被开发者插手改成 B 状态了,然后你让 AI 基于它的认知继续修改,结果可想而知:要么产生混乱,要么 AI 需要再读一遍所有内容。有时候光是解决这种不同步带来的问题,花的时间就比写代码还多。

What are micro-interactions

Microinteractions are the satisfying little details in performing a single task, which can be summarized as acknowledgment.

What are reverse proxies

当出入流量都经过同一网关类的设备时,这个设备即工作在Reverse Proxy模式。在负载均衡中,Reverse Proxy即出入流量都经过负载均衡。此时这个设备需要有能力负担所有的(正常与不正常的)流量。

When are the single square brackets in bash

The square brackets are a synonym for the test command. An if statement checks the exit status of a command in order to decide which branch to take. grep -q "$text" is a command, but "$name" = 'Bob' is not--it's just an expression. test is a command, which takes an expression and evaluates it:

流感与普通感冒的区别

平时所说的感冒一般被称为普通感冒(common cold),其实不算是一种疾病,是一组非流感病毒造成的急性上呼吸道感染,如鼻病毒、副流感病毒、呼吸道合胞病毒、冠状病毒等。如无并发症,一般经5~7天痊愈。

肩峰撞击

本质是这两块骨头产生了撞击发出声响