Linux

SSH is a security protocol based on application layer and Transport layer, and SSH protocol can prevent information leakage between computer communication.The SSH protocol commonly used under Linux is SSH command, and SCP command, there is no

Many services are turned on when the Linux/unix system is booted, and these services are called daemons (also called daemon processes). A daemon is a process that is detached from the control terminal and periodically performs some sort of task in

Linux users and their managementFirst, the conceptLinux users are carriers that can access limited Linux system resources by creating and authenticating with system permissions.Second, classification1, the administrator (Superuser-root): This user

Btrfs is a very powerful file system on the Linux system, full name: B-tree, was developed by Oracle in 2007 based on the GPL agreement. So how do we create and use it for Btrfs file system? Below we will study it in the experiment with the CENTOS7

The software management mechanisms commonly used under Linux systems are in the form of source code and the rpm (Redhat Package Manager) packet management mechanism, in which we will explain the two software management mechanisms.RPM Package

Recently used the next Raspberry Pi and Inter Edison, originally intended to use the network card, but found that the Raspberry Pi and Edison can not compile the official driver, error missing/kenerl/bulid directory, check the information, the

1. summarize the use of the commands involved in this course and the relevant examples show:Chmod,chgrp,umask,chown,grep,egrep2. summarize basic regular expressions and extended regular ExpressionsFormat:grep [OPTIONS] PATTERN [FILE ...]

One, Inittab document detailed(a) The Inittab document detailed:# 0-halt (do not set Initdefault to this)//stop, shut down Linux, stop all services# 1-single User mode//single user modes# 2-multiuser, without NFS//multi-user mode, no NFS access#

we're working on Linux to tell the file which owner it belongs to and which group it is. So we need to know how to set ": settings file owner, group Chown:change owner >chown    host    filename >chown   . Group    filename >chown 

OpenSSL is a strong Secure Sockets Layer cipher library that includes key cryptographic algorithms , common key and certificate encapsulation management functions , and SSL protocols, and provides a rich set of applications for testing or other

Command: chmod (change the properties of a file)R:4W:2X:1How to use: chmod 744 1.txt (assigning values to 1.txt files)chmod u=rwx,g=rw,o=r-x 1.txt (assigning values to 1.txt files)chmod u-x 1.txt (1.txt file owner minus x permission)CHMOD-R 700 111 (

Before analyzing virtual memory management, look at the detailed allocation of Linux kernel memory I was stuck in this place, and the kernel memory classification is not very clear. I extract one of the following:Kernel memory address================

What is embedded Linux to learn? Some people are always thinking, afraid of taking a detour, but also afraid of learning things from the enterprise needs far. So today please huaqing Visionary Senior Lecturer Cao told you, 9 points analysis of

Linux is a set of free-to-use and freely-propagated Unix-like operating systems that are first used on computers based on the x86 series CPUs. The system is designed and implemented by thousands of programmers around the world. The aim is to create

Basic Linux tutorial-data stream redirectionIntroduction I started to feel a little unfamiliar with the concept of redirection, but I have seen it many times through the previous course.>Or>>And know that they direct the standard output to a file or

Install VMware 10 in CentOS 7 This article mainly introduces how to install Vmware 10.0.3 on CentOS 7. After installing VMware 10.0.3 on CentOS 7, it cannot work normally, in fact, this is mainly because the kernel in CentOS 7 is earlier than the

How to modify IP address, gateway, and DNS in Linux Command Line This article will briefly describe how to use Linux Command lines to modify IP addresses, gateways, and DNS. Change the IP address of eth0 to 102.160.1. Ifconfig eth0 102.160.1

Common linux commands are useful. 1. ctrl + A returns the character at the front of the edge. 2. When ctrl + R is used to query history, the command used is prompted. 3. In vi, move to the row header, press the number 0, and move to the end of the

32-bit system. When setting vm. min_free_kbytes, pay attention to the lowmem value. The Memory Policy in the kernel is adjusted today. One machine is a 16 GB 32-bit system with 16 GB memory. the min_free_kbytes value is set to 5% of the physical

Zabbix Agent active mode monitoring Zabbix_server collects data from the Server when there are too many hosts. Zabbix has serious performance problems, mainly as follows: 1. When the monitored end reaches an order of magnitude, the Web operation is