tcpdump-examples / linux-ip-mac.md

Created January 18, 2022 13:48

linux 最常用的查看mac地址的方式有很多种，下面给出4种方式，

ifconfig 这是最常用的方式

ip link show

cat /sys/class/net/eth0/address 查看eth0的mac地址

dmesg | grep eth0

how to check mac address in Linux

tcpdump-examples / python-list-length.md

Created January 18, 2022 13:40

Python是一种非常具有表现力的语言，它提供了不同的结构来简化开发人员的工作。该列表是python提供的最受欢迎的数据结构之一。在常规工作流程中，我们在列表中添加元素或从列表中删除元素。但是在这种浮动的情况下，我们需要获取列表的长度。我们如何获得列表的长度或大小？在本教程中，我们将研究获取长度列表的不同方法。

使用内置的len()函数

如前所述， len是默认情况下python提供的内置函数。我们可以使用此功能，仅将列表作为参数提供，如下所示。语法非常简单，我们仅将len() ，数组中的列表，数组，元组或字典类型变量提供为数组。

name_list=['ismail','ahmet','ali'] len(name_list)

fruit_list = ['apple', 'banana', 'carrot' , 'melon' , 'tomato']

tcpdump-examples / linux-os-version.md

Created January 18, 2022 13:39

The OS version of a Linux distribution can be determined by using the command-line interface as well as a graphical user interface.

Command	Example
uname -a	$uname -a Linux ip-10-0-0-224 5.4.0-1045-aws#47-Ubuntu SMP Tue Apr 13 07:02:25 UTC2021 x86_64 x86_64 x86_64 GNU/Linux
more /proc/version	$ more /proc/version Linux version 5.4.0-1045-aws(buildd@lcy01-amd64-026)(gcc version 9.3.0(Ubuntu 9.3.0-17ubuntu1~20.04))
more /etc/os-release	$ more /etc/os-release NAME=”Ubuntu”VERSION=”20.04.2 LTS (Focal Fossa)”ID=ubuntuID_LIKE=debianPRETTY_NAME=”Ubuntu 20.04.2 LTS”VERSION_ID=”20.04″
lsb_release -a	$lsb_release -a No LSB modules are available.Distributor ID: UbuntuDescription: Ubuntu 20.04.2 LTSRelease: 20.04Codename: focal

tcpdump-examples / linux-find.md

Created January 18, 2022 13:37

用途 find命令用于在指定目录下查找文件。

全称无

参数

-name ：后跟需要匹配的文件名模式，需要使用引号引起来

tcpdump-examples / python-list-append.md

Created January 18, 2022 13:35

python append描述 append函数可以在列表的末尾添加新的对象。函数无返回值，但是会修改列表。

append语法

list.append(object) 名称说明备注 list 待添加元素的列表 object 将要给列表中添加的对象不可省略的参数 3 examples to append list in python

tcpdump-examples / python-list.md

Created January 18, 2022 13:26

Python 列表

序列是Python中最基本的数据结构。序列中的每个元素都分配一个数字 - 它的位置，或索引，第一个索引是0，第二个索引是1，依此类推。

Python有6个序列的内置类型，但最常见的是列表和元组。

序列都可以进行的操作包括索引，切片，加，乘，检查成员。

此外，Python已经内置确定序列的长度以及确定最大和最小的元素的方法。

tcpdump-examples / Python3-ssl.md

Created January 18, 2022 13:22

Python3 打开 https 链接,异常：“SSL: CERTIFICATE_VERIFY_FAILED” 一、问题 Python2.7.9 之后，当使用urllib.urlopen打开一个 https 链接时，会验证一次 SSL 证书。而当目标网站使用的是自签名的证书时就会抛出如下异常：

二、解决方案 1，方案一使用ssl创建未经验证的上下文，在urlopen中传入上下文参数：

tcpdump-examples / linux-find.md

Last active January 18, 2022 13:19

find命令特点：文件查找，实时查找，速度略慢，精确匹配

使用格式：# find [options] [查找路径] [查找条件] [处理动作]

查找路径：默认为当前目录

查找条件：默认为查找指定路径下的所有文件

处理动作：默认为显示

tcpdump-examples / dns-intro.md

Last active October 1, 2021 10:55

DNS is short for Domain Name System. It is simply a database that links meaningful names (known as hostnames), such as howtouselinux.com, to a specific IP address, such as 185.230.63.171.

Each device connected to the Internet has a unique IP address. With the system of DNS, we don't have to memorize IP addresses.

DNS records

All domains are required to have at least a few essential DNS records for a user to be able to access their website using a domain name. This is the key concept of DNS.

Here are 4 commonly used DNS records.

tcpdump-examples / games.md

Created October 1, 2021 10:52

CrazyGames is a free online games website with more than 10 million active users monthly. The company was founded in 2014 by Tomas and Raf Mertens and has grown to 9 people.

The platform features games ranging from 3D shooters to puzzle games. The most popular categories are driving games, clicker games, minecraft games, stickman games, and .io games.CrazyGames is a member of KBC Start-it.

CrazyGames - An Amazing Free Online Game Website

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