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I helped my friend maintain the server of his website. Recently, the traffic surge and the server pressure surge. Let's look at the nginx log. There are a large number of POST requests for several specific php requests. One IP address will POST four

I helped my friend maintain the server of his website. Recently, the traffic surge and the server pressure surge. Let's look at the nginx log. There are a large number of POST requests for several specific php requests. One IP address will POST four

28 typical O & M questions on April 9, 2017 !, 2017 1. in Linux, how does one Mount shared directories in windows? Mount. cifs // ip address/server/mnt/server-o user = administrator, password = 123456For linux server, you need to

C ++ 11 deep learning Delegate constructor Before C ++ 11 is introduced, if a class has multiple overloaded constructors and these constructors have some common initialization logic, you usually need to write another initialization function with

Auto variables, namespaces, using roles and scopes in C ++Zookeeper 1. usage of the auto keyword A: Automatic variables can automatically obtain types and outputs, similar to generic variables. B: automatic variable, which can realize automatic loop

C # The thread joins the instance, There is a question: Four threads t1, t2, t3, t4, write data to four files, requirements: t1 can only write "1", t2 can only write "2 ", t3 can only write "3", t4 can only write "4", write the following content to

Describes the _ getitem _ method in Python and slice object slicing operations, Although the Fib instance can act on a for loop, it looks a little like a list, but it still cannot be used as a list, for example, taking 5th elements: >>>

"Therelationship between JQ and JS ": JQ is a common method for the encapsulation, simplification and optimization of JS." Little Tricks " Ctrl+k+d:vs write code when the format is messy, the shortcut keys used to organize the code-------------------

Python topic basic knowledge of three strings, python Basics The most important data types in Python include strings, lists, tuples, and dictionaries. This article describes the basics of Python strings. I. String Basics A string refers to an

Python script to export data in excel format (recommended), python data export During my internship, a senior engineer from the server asked me to help sort out the server's log data. Finally, I used Python to extract the data and export it in Excel

Python has many built-in data types, such as integer, String, tuples, list, dictionary, and Boolean, the following describes in detail the data types in Python as follows: Number (Number) includes int, long, float, complex String (String) for

Tcpdump filter a port we use Tcpdump are used: Java code tcpdump-iethxwww.2cto.com the following command is to view the access to port 80, sort, take the first 20 Java code tcpdump-ieth0-tnndstport8... tcpdump is used to filter a port. generally,

Awk replacement matching awk replacement text content learning feels good [root @ localhosttest] # catawk1a9, 100.341b1, 999.001c5, 656.55 [root @ localhosttest] # awk & amp; #39; {sub (/1/, & quot; test & quot;)} {print & quot; \ n & quot; awk

The most important data types in Python include strings, lists, tuples, and dictionaries. This article describes the basic knowledge of Python strings. Let's take a look at the following: the most important data types in Python include strings,

View connections across all port 80 netstat-nat | grep-i80 | wc-l sort connected IP addresses by number of connections netstat-ntu | awk {print $5} | cut-d: -f1 | sort | uniq-c | sort-n view TCP connection status netstat-nat | awk {print $6} | sort |

: This article mainly introduces the linuxawk time computing script. if you are interested in the PHP Tutorial, refer to it. In linux, if the scheduled time is too long, Run the following awk script: BEGIN {FS = ":"; OFS = ": "} {total_seconds

Use hosts. deny to reject ssh test LogonThis is mainly to take into account the fact that, after opening ssh on the public network, some people keep trying to connect and automatically refuse.#! /Bin/bash# Zhao Yun# Automatically monitor ssh test

Use shell and iptables to automatically reject malicious attempts to connect to the SSH service and send an email to the Administrator. [Root @ ZHAOYUN ~] # Cat ssh. sh#! /Bin/bashTIME = 'date + "% Y-% m-% d % H: % M: % S "'BADIP

The netstat command is used to print the status information of network systems in Linux, allowing you to know the network conditions of the entire Linux system.-A (All) displays all options and does not show listen related by default-T (TCP)

1 #Author:ersa2 3Name ="Ersa"4 5 #Initial Capital capitalize ()6 Print(Name.capitalize ())7 8Name ="My name is Ersa"9 #number of substring repeats in stringTen Print(Name.count ("a")) One A #The Center () string prints the output in the middle and