Linux

First, the DR Model LVs build 1, preparation work Scheduler dir:192.168.242.128 Real server rs1:192.168.242.129, gateway reverts to previous original gateway Real server rs2:192.168.242.130, gateway reverts to previous

The. M2 folder in AvenAfter installing MAVEN, there is no. m2 folder. Folders with a. Start in Linux are hidden. When you use the MAVEN command, MAVEN automatically creates the. M2 folder.Run the command mvn help:system to view the Java System

User accounts are divided into: Super users, System users, ordinary users.Super users:User name: root; uid:0;System users:User name: Set by User, uid:1~499 (CENTOS6 and before), 1~999 (CENTOS7);Normal User:User name: Set by User, uid:500+ (CENTOS6

1. File or Directory PropertiesThe properties of a Linux file or directory include: The file or directory's node, kind, permission mode, number of links, the user and user group to which it belongs, the time recently accessed or modified, and so on.

Linux belongs to the network operating system, so the network function is the important core function of Linux. We know that the network model includes the total Linetype network, the Star network, the Token Ring network and so on. Data transmission

First, installationYum-y Install GraphvizSecond, the test1. Test whether the installation is successful[email protected] ~]# which dot/usr/bin/dot[Email protected] ~]# dot-vDot-graphviz version 2.30.1 (20150306.0020)2, test whether can draw1) Create

When executing some programs in Linux, these programs must first authenticate the user who initiated it before executing, such as login, Su, etc. The authentication process for identity or status in Linux is performed by Pam , and Pam (pluggable

1 Mission planningTo put it bluntly is a timer that runs a command or script that allows us to automatically perform any related tasks at rest time.Look at its configuration file: Cat/etc/crontabThe first line defines the shell environmentThe second

One iptables regular backupservice iptables saveWill save the rules to/etc/sysconfig/iptablesBack up the iptables rule to the My.ipt fileIptables-save > My.iptRestore the rules you just backed upIptables-restore Two FirewalldFirst we proceed to the

People who have played Linux will know that there are really a lot of commands in Linux, but people who have played Linux have never bothered by the fact that Linux commands are so many, because we only need to master the commands we use most often.

Simple overview of process management in LinuxDirectoryLinux kernel feature BriefProcess-related conceptsProcess Management Viewing ToolsA Linux kernel feature Brief1. Process ManagementThe kernel is responsible for creating and destroying processes

I. Saving and backing up iptables rulesService Iptables Save//rules will be saved to/etc/sysconfig/iptables iptables-save > My.ipt//iptables rules back to My.ipt file iptabl Es-restore Second, FIREWALLDOpen FirewalldSystemctl Disable

time:18.03.26The following 2 typical files and directories are analyzed: ll /usr/bin/passwd -rwsr-xr-x. 1 root root 27832 Jan 29 2014 /usr/bin/passwdll -d /tmpdrwxrwxrwt. 23 root root 4096 Mar 25 23:53 /tmpSUIDWhen it s appears on the permissions

Problem Description:Weekend Run Disk Platform service program, Monday to the operating system, the main process has exited, the restart Process prompt read-only file system, new directory and other Chmod-r, and so on read-only the file system.Cause

Linux O & M learning notes-MySQL Log learning and learning notes-mysql I. Error Log: Error Log 1. Introduction An error log is an error message that records the MySQL service process mysqld during startup, shutdown, or running. The error log

Linux Firewall NAT-SIP network topology, natsip Environment: Firewall: Ubuntu Server 17.10. SIP-Yate client, Asterisk Server Network Topology: 1) configure the IP address of the firewall and enable forwarding: ifconfig enp2s0 192.168.1.131

Nginx OCSP stapling configuration, nginxocspstapling Nginx OCSP stapling configuration. Correct OCSP stapling configuration can improve HTTPS performance. What is OCSP stapling? OCSP stands for Online Certificate Status Protocol, that isOnline

In Linux, how does one convert the file encoding format ?, Linux encoding format First, let's take a look at how to view the file encoding format in Linux. You can use the following command in vim to view the file encoding format: : Set

TortoiseSVN client simple tutorialSimple use of client TortoiseSVN 1. First download tortoisesvn software (http://tortoisesvn.net/downloads.html) corresponding to svn version from the website this case to download the latest 64-bit 1.9.7 and

LVS-DR + Keepalived Web Server dual-host hot standby configuration Keepalived is a software similar to the layer3, 4 & 7 switching mechanism, that is, layer 3rd, layer 4th, and layer 7th switching. Keepalived is automatically completed without