Programmer Think

preface The limit parameter in Linux can generally be set by ulimit command or editing / etc / security / limits Conf reloads to make it effective ulimit is more direct, but it is only valid in the current session. Limits Conf can make the user take effect in the next login according to the user and restrictions 1, ulimit command 1.1ulim ...

Networking requirements When the network is relatively simple, or the router cannot establish a route to the destination network through the dynamic routing protocol, the static route can be configured. However, different from the dynamic routing protocol, the static routing itself has no detection mechanism. When the network fails, the static ...

1, Preface overview and basic theory 1.1 ELK system introduction ELK log analysis system is composed of Elasticsearch, Logstash and Kibana Elasticsearch: open source distributed search engine. Features: distributed, zero configuration, automatic discovery, automatic index fragmentation, index copy mechanism, restful style interface, m ...

1. Hierarchical structure of image Share the kernel of the host;The base image provides the smallest Linux distribution;The same docker host supports running multiple Linux distributions;The biggest advantage of adopting hierarchical structure is: sharing resources; Copy on write writable container layer, equivalent to snapshot of virtu ...

preface 1, Continuous integration 1. Software development life cycle Software development life cycle SDLC, a collection of plans, development (code landing), testing (function test / stress test / unit test / release online) - > collect user feedback ----- > upgrade 2. Software development waterfall model Waterfall mode ...

From a practical point of view, this article introduces how to combine our commonly used GitLab and Jenkins to realize the automatic deployment of the project through K8s. The production architecture diagram currently used by the company is the focus of this explanation, as shown in the figure:The tools and technologies involved in this paper i ...

preface When we are developing on linux platform, we will basically encounter time-related operations. This paper analyzes and summarizes the commonly used time-related structures and interfaces. Common types and structure definitions timespec prototype struct timespec { __time_t tv_sec; /* Seconds. second */ __syscall_slong_t tv_nsec ...

Description (read!me!please!!!): ① The purpose of this article is to explain that the attached code is fragment interception. Each fragment focuses on showing a function. Different fragments have omitted and overlapped parts. See GitHub for the complete project code 👌 ② Pay attention to the code comments, which can be said to be relatively d ...

Intrusion detection windows I Account, process, self start ① Detection account 1. Direct analysis in Windows Open the cmd window and enter lusrmgr MSc command to check whether there is a suspicious account 2. Log analysis "eventvwr.msc #Event viewer and export Windows log -- Security #Analyze with Log Parser Typical command 1,Query th ...

format string vulnerability Introduction to formatting strings Common formatting string functions functionBasic introductionprintfOutput to stdoutfprintfOutput to the specified FILE streamvprintfFormat the output to stdout according to the parameter listvfprintfFormat the output to the FILE stream according to the parameter listsprintfOutpu ...