iptables常用参数

• -A：将规则添加到当前链的末尾。
• -D：从当前链中删除规则。
• -I：将规则插入到当前链中指定的位置。
• -R：替换当前链中的规则。
• -L：列出当前链中的规则。
• -F：清空当前链中的所有规则。
• -N：创建一个新的链。
• -X：删除一个链。
• -P：设置链的默认策略。
• -s：源地址。
• -d：目标地址。
• -p：协议。
• -m：模块。
• -j：跳转目标。

Go中的GMP

Go中的GMP（Grand Memory Pool）是一个内存池，它提供了一个用于管理内存分配和释放的通用机制。GMP可以提高内存分配和释放的效率，并减少内存碎片。

GMP的组成

GMP由以下部分组成：

• 内存池： 内存池是一个由固定大小的内存块组成的集合。当需要分配内存时，GMP会从内存池中分配一个内存块。
• 内存块： 内存块是GMP的基本分配单元。内存块的大小是固定的，并且不能被修改。
• 分配器： 分配器负责从内存池中分配和释放内存块。
• 释放器： 释放器负责将内存块归还给内存池。

# Linux/macOS
npm config set registry https://registry.yarnpkg.com

# Windows
npm config set registry "https://registry.yarnpkg.com"

How to fix this: premature EOF errors in crontab file, can't install

1. Check for Missing Newline Characters:

   Make sure each line in your crontab file ends with a newline character. The absence of a newline character can cause premature EOF errors.

2. Check for Spaces at the End of Lines:

   Trailing spaces at the end of lines can also cause premature EOF errors. Ensure that there are no extra spaces after the command or arguments on each line.

3. Fix Incorrect Syntax:

   Carefully review the syntax of your crontab entries. Double-check the format and ensure that all fields (minute, hour, day, month, weekday, and command) are present and in the correct order.

Kubernetes Secret 资源对象使用方法：

Here are some PostgreSQL commands that are similar to \dt, which is used to list all the tables in the current database:

Ice Breaking Topics

• How often do you want to travel for pleasure?
• If you could travel to any fictional world
• What's your favourite TV series?
• What is the most beautiful place you have ever visited?
• Do you like to exercise? If so, what is your favorite type of exercise?
• What is the most famous natural site in your country?
• Do you usually buy goods on-the-spot or compare prices at other shops before you buy?
• Which would you rather have: $1,000,000 today or 1 cent doubled every day for 30 days?

Ice Breaking Topics

• If you could do anything illegal without getting caught, what would you do?
• How do you usually spend your evenings?
• Have you ever worked in a restaurant?
• Should there be advertisement-free zones?
• How do you define success in your life?
• Do you prefer to follow a schedule or do you like your time to be unstructured?
• What is the best way to live one's life?
• If you could change one thing about you, what would it be?

Ice Breaking Topics

• When is the appropriate age to get married?
• What is considered cheating in a relationship?
• What would you do if you found out that you had a long-lost sibling who was a billionaire?
• Have you ever lived with a significant other?
• If you could travel back in time, which era would you choose to visit?
• Are wars inevitable as long as humans exist?
• Which would you rather have: $1,000,000 today or 1 cent doubled every day for 30 days?
• Have you ever rejected someone? What did you say?

Ice Breaking Topics

• If you could have dinner with anyone, living or dead, who would it be and why?
• If you were able to live to the age of 90 and retain either the mind or body of a 30-year-old for the last 60 years of your life, which would you want?
• What does the ideal life look like?
• If you could change one thing about you, what would it be?
• What is the best vacation you have ever been on?
• How often do you update your status on social media?
• Do you like to cook? If so, what is your specialty?
• Do you live to work or work to live?