Linux

TC Flow Control Project Background vintage3.0 interface Lookupforupdage Adds a policy when bandwidth traffic TX or RX exceeds 40%,75% randomly returns 304; more than 60%, this interface returns 304 In order to control the flow of the

Linux Basics (mount,umount and boot auto mount)Source: Linux Community ChawanOriginal link http://www.linuxidc.com/Linux/2016-08/134666.htmThe following is a study of the author of this article to do some summary and learning experience.

What is a socket?Sockets originate from UNIX, and one of Unix/linux's basic philosophies is that "all files" can be manipulated using the "open open–> Read and write write/read–> close" mode. In fact, the socket is an implementation of the pattern,

Special permissions and ACLsSpecial permissionsSUID:When running a program, the owner of the corresponding process is the owner of the program file itself, notThe user itself, only valid for the binary program, the performer must have X permission

Add by Zhj: Here's a good explanation of what WA means in the top command, and we know that when Io is blocked, the operating system changes the process to a blocking state, and the CPU is scheduled to run other processes.When the CPU is idle, it

Distance from the last update article has been a period of time, small in this period of time because of some trivial, coupled with physical illness can not update the article, today the body gradually restored to update the article, Today's dream

Linux Beginner-File Management ChapterEverything in the Linux system is stored as files in the computer, so the management of the files in the Linux system is very important. The following are some common approaches to file management.1, the

Basic EnvironmentInstalling the Epel source[Email protected] ~]# yum-y install Epel-releaseDisable firewall[Email protected] ~]# Systemctl stop Firewalld[Email protected] ~]# systemctl disable FIREWALLDTurn off SELinuxTemporarily closed:Setenforce

First, why use ACLsLet's start by simply reviewing the Linux file permissions.Under Linux, objects that can operate on a file (or resource) are divided into three categories: file ownerGroup, note that it is not necessarily the group where the file

8) There is a class of users in the system called Pseudo-user (Psuedo users).These users also occupy a record in the/etc/passwd file, but cannot login, because their landing shell is empty, their existence is mainly convenient system management, to

Three chapters command wildcard character, PATH variableWildcard characters that support multiple literalsWildcard meaning* Match 0 or more characters？ Match any single character[0-9] numbers within the matched range[ABC] matches any character that

CPU Total Cores = number of physical CPUs * Number of cores per physical CPUTotal logical CPUs = number of physical CPUs * Number of cores per physical CPU * Number of hyper-threads~]# Cat/proc/cpuinfo | grep name | Cut-f2-d: | Uniq-c

access to help documentsExternal command: There is an executable program , located in a file system directory, you can use which, Whereis command query to the location of the command store. The path of the shell program search executable

Sockets are abstractions of communication endpointsCreate a socket#include int sockets (intint int) protocol); return value: Success file (socket) descriptor, failed -1Domain: The Protocol field, also known as the Protocol Family (family). Common

The environment is as follows:Status: A Linux host has two network cards eth0 and eth1, the machine can access the service resources of 192 network, but cannot access 10 network segment resources.Requirement: Linux can access 10 network segment

How many long connections can a Socket TCP server have on a port?There are many answers on the internet, I don't know that's rightTheoretically, it's infinite.16, Linux, a port can accept the number of TCP links theoretical limit is?a.1024b.65535c.65

Although the Linux system is very powerful, stable, but we use the process, if the human operation is not appropriate, will still affect the system, and may even make the system does not boot, unable to run services and other problems. Then this

2017-10-17 Linux Small Butler Have you ever encountered a need to find a specific string or style in a file, but don't know where to start? So, just ask grep to help you.grep is a powerful file-mode search tool preinstalled on every

Common commands (1) 1. System-related commands Su Switch users Hostname View Host Name W.H.O. View users logged on to the system WhoAmI Confirm your

Linux application: automatically delete logs n days ago and logs n days ago Linux is a system that automatically generates files, such as logs, emails, and backups. Although hard disks are cheap now, we can have a lot of hard disk space to waste