Linux

Some basic instructions related to the database The great God can skip directly, may sometimes often do not use, but when used to find not.The following is a brief statement of the commonly used database-related statementsFirst view MySQL related

First, hardware information1, total number of cores = number of physical CPUs x number of cores per physical CPU # Total Logical CPUs = number of physical CPUs x number of cores per physical CPU X number of hyper-threads2. View the number of

Lab environment: Create an LVM logical partition in CENTOS7 and disk quotas for that partition.-----Procedure-----1 First add several disks to Centos7 for experimentation in the virtual machine VM14 software option.Add a hard drive (at least two) in

I. Shortcuts commonly used in the shellShortcut keys in the man interface:？ Keyword up search keyword keyword,n down search, n continue search up/keyword down search keywords keyword,n continue search down, n searchQ Exit man pageIi. directives1.

clearlog.sh#!/bin/shFind/usr/local/apache/logs-mtime + 30-name "*.log"-exec rm {} \;Description Find:linux Find command, the user finds the file for the specified condition /usr/local/apache/logs: The target directory to be cleaned

Information view端口占用：lsof -i:端口 查看MAC网卡：ifconfig -a 其中 HWaddr字段就是mac地址时间戳转换：时间戳转字符串：date -d @1509602291 "+%Y-%m-%d-%h"字符串转时间戳：?date -d "2010-10-18 00:00:00" +%s?Text manipulation(1) Text filtering: grepCommon option:--color:过滤字段红字标红-v：不包含-A

What is an aliasIn the process of managing and maintaining a Linux system, a large number of commands will be used, and some long commands or usages are often used, and it is undesirable to repeatedly and frequently enter a very long command or

Important files in/etc directory/etc/sysconfig/network the network configuration information on the specified server/etc/rc.d/init.d/network the network configuration script information Network configuration script, Power on the script file

/boot directory, which is the startup directory, which is the startup file (the directory can not be put things)/dev Device File save directory/etc configuration File Save DirectoryHome directory for normal users/lib System Library Save

1, double-click2, run3, next4, agree, next5, change the path, put the place you want to put D:\Program files\vmware\vmware workstation\ Click Next6,7,8, installation9,10,One by one, go to the place where you can find vmware.exe double-click12,The

MAVEN is required to install because existing projects are packaged with MAVEN1. Create a DirectoryMkdir/mavencd/maven2, download the unzip maven, here choose Maven version for 3.5.3wget HTTP://MIRRORS.HUST.EDU.CN/APACHE/MAVEN/MAVEN-3/3.5.3/BINARIES/

System security Minimum principle1. Install Linux system to minimize, select package minimized, do not install2. Boot service minimized (5) SSH network Sysstat crontd rsyslog3. Operation Command minimized RM-RF h.txt (Error action)4. Login minimized,

Objective"Linux?" I heard it is an operating system, easy to use? ”"I don't know, what's the difference with Windows?" Can I play lol on Linux? ""Don't mention, I used Linux, is a black screen, the mouse can not be used, constantly tapping the

Useradd Add/create UserUserdel-r Deleting a userID Shizhengwen View User (Shizhengwen is user name)usermod-d Modify the user's profile in the home directory, after the modification also need to copy the original home directory of the configuration

This article also goes on to introduce some common commands about Linux;1. >: Output REDIRECT Command　　This command is primarily used to redirect command execution results to a file, that is, the execution results should be output to the on-screen

Brief introductionLRZSZ Official entrance: http://freecode.com/projects/lrzsz/Lrzsz is a UNIX communication suite that provides the X, Y, and Zmodem file transfer protocolsWindows needs to upload files to the CentOS server to execute commands

Condition: A single Linux virtual machine, a Windows virtual machinePremise: Two virtual machines are interconnected (here the Windows virtual machine is set to get the IP address automatically)1. Mount the CD and install the DHCP package with

1) Install CentOS7.4 Linux operating system based on Vmware Workstation, and configure IP address, remote connection via Xshell and CRT;2) The complete process of writing CentOS7.4 installation based on the Word document, and writing the

Common physical hard-disk interfaces:The same port: IDE (133MB/S), SCSI (640MB/S)Serial port: SATA3 (6Gbps), SAS (6Gbps), USB (480MB/S)Storage mechanism of mechanical hard disk:The motor drives the disc to rotate, each disc is divided into n

1. Permanent modification, valid for all users# Vi/etc/profilePress Keyboard [Shift + G] To add the following at the end of the profile file:Export Java_home =/home/myuser/jdk1.7.0_03Export PATH = $JAVA _home/bin: $PATHExport classpath=.: $JAVA