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Supervisor overviewSupervisor is a Client/Server mode system that allows users to monitor and control multiple processes, or programs, on a unix like operating system. Supervisor has the same functions as launchd, daemon tools, runit and other programs. Different from some of them, it does not replace init as a "process with id 1". On ...

Recently, my test virtual machine was a little abnormal. I found a strange process named vp0erom, which has a particularly high cpu occupancy. So I tossed and analyzed it, trying to find out the reason. After looking at the ip connected to the process, I knew it was a mining virus. The following is a simple analysis process. 1. The top comma ...

Redhat 6.7 x64 upgrade SSH to OpenSSH_8.6p1 This is the original author link: https://www.cnblogs.com/xshrim/p/6472679.html Introduction Version 6.7 of Redhat enterprise system comes with an SSH version of OpenSSH_5.3p1. Based on audit and security requirements, it needs to be upgraded to the latest openssh version. The latest version on ...

String related operations are often involved in shell batch programs. There are many command statements, such as awk and sed, which can perform various string operations. In fact, a series of operation symbols are built into the shell, which can achieve similar effects. As we all know, the use of internal operation symbols will omit the time to ...

Tomcat About Tomcat # What is Tomcat? Tomcat Is a lightweight based Java Free and open source Web The server/Servlet Container. # What can Tomcat do? Deploy your Web engineering, Provide access control services for your web resources. # The origin of the name Tomcat? Tomcat It is a wild cat that does not rely on humans and lives ind ...

BIO and NIO Note: the io models discussed in this paper are based on the network communication socket BIO -- blocking IO model In network communication, the client establishes a connection with the server first. Because the server does not know when the client will send data, the server has to start a thread to receive messages from the clie ...

preface before LEF file - stack backtracking This paper only describes the process of stack backtracking through exidx, which will be described according to eh_frame stack backtracking principle and process. Principle description The core of dwarf is a table, which is obtained according to the stack pressing process of a function. Take the ...

2021SC@SDUSC Shell Shell is a program, which can be called shell program, which is used for users to interact with the operating system. It is used to distinguish between and core, which is equivalent to a command parser. There are many shells, and several of them are listed here Bourne SHell(sh) Bourne Again SHell(bash) C SHell(csh) Korn ...

HA - Keepalived Principle analysis ** 💯 Introduction: * * kepplived high availability technology prevents the inevitable impact of a single point of failure of the service and enhances the high availability and security of the service. For example, the failure of middleware rabbitmq, mysql, mycat, Haproxy and other servers will affect the ...

Intranet penetration using FRP (dynamic domain name resolution) This article uses a minimalist configuration. If you have special requirements, please refer to https://github.com/fatedier/frp literature Environment preparation: Internet server (ubuntu) + local machine (ubuntu subsystem) The local server windows can be configured ...