Linux

Mysql8.0.12 Basic operations explain Command Installing the service side Yum Install Mysql-community-server Start Service Mysqld Start/restart Stop it

The most common is the Rdate serviceInstallation (CentOS for example):Yum InstallUsage:Time-b.nist.govAfter the execution of the above method time is synchronized. Some servers are not allowed to be separated for a period of time, so we have to add

1. Official website Download Jdk10Two kinds of download, one is wget download, one is the Windows system download, and then upload to the Linux system.　　　　2. Unzip to/usr/local/javaTAR-ZXVF jdk-10.0.2_linux-x64_bin.tar.gz-c/usr/local/java/　　3.

Yum Basics? ? Using RPM to install, uninstall software or services in Linux often encounter the dependence of RPM package, and we install software A, the hint depends on software B, when installing software B will be prompted to rely on a series of

In the Linux,unix system, the permissions are divided into rwx (421), which is ordinary permission, I believe we all understand, but there is a class of special permissions may be some people do not understandCasesNote: The login user is JackExecute

Requirements Description :Today in writing crontab, there are standard output and error output, previously used is >/dev/null 2>&1That's the equivalent of outputting both the standard output and the error output to the/dev/null, which is recorded

First, what is LVM?LVM is the short name for logical volume management (Logical Volume Manager), an abstraction layer built on a physical error device that allows you to generate logical storage volumes. and direct use of physical storage provides

Linux basic commands:Basic command: TTY terminal common Command Prompt commandSystem-Related commands: View system version View CPU view memory Information shutdown operation (init 0) Restart operation (Init 6)TTY Terminal:In the Linux default login

# 2018/7/29 10:17:46 Test Success! Introduction to a Tree commandThe tree is a recursive directory List command that produces a deep indent list file.Two Tree command installation1. Download the installation package, address:

ObjectiveAs an Ubuntu rookie, see the Linux system under a lot of unintelligible directory name is really crazy, so in this simple summary under the common Linux System file directory and its role, behind the new knowledge will be constantly updated.

CAL-Y 2008 Query Fixed yearDate View current timeDate "+%y=====%m=====%d" Time special formatY 20 + y back two digitsDatePs-aux See all currently running programsTopHtopKill Add Program numberKill-9 forced KillReboot restartShutdown-h (now or time)

Redirection refers to the output of data to other places, such as devices, files, and so on. That involves the question of where to send the data.The origin and result of command execution in Linux, see:Standard input and standard error are output

I said last time how to build a Linux virtual machine environment, but there are a lot of problems after the completion, screen resolution is too small is one of them.To give you a comfortable working environment, let us now teach you two ways to

You must first understand the two most basic commands:Tail-n test.log query log at the end of the last 10 lines;Tail-n +10 test.log Query all logs after 10 lines;Head-n test.log Query log file in the first 10 rows of logs;Head-n -10 test.log query

1, Gpl,gnu, free software?2, how to choose the Linux operating system version?3. How to partition Linux system?4, Linux 20 commands and role?5. Linux Run level?6, 32-bit and 64-bit system differences and how to choose?7. What is the PATH environment

Mtime "Modified Time" Documents/ modified time of the catalog CTime "Property modification Time" modified time of the properties of the file directory Atime "Access Time" File/ access time of the directory Stat 123.txtFile: ' 123.txt

Features of the Linux directory structure1, hanging upside down the tree2,/root is the vertex of the Linux directory3. Directory and disk partitions are not associated4,/root directory may correspond to different partitions or disks

1.use of the Remote connection toolin actual development, Linux servers are in other places, we have to connect to Linux through remote way to operate it, Linux remote operation tools are many, enterprises commonly used in Puttty, SECURECRT, SSH

First, backup1. Check if the Vixie-cron RPM package is installed to determine if the package is installed, use the Rpm-q vixie-cron command. [[email protected] ~]# rpm–q vixie-cron2. Determine whether the service is running, use the/sbin/service

Our Internet use of IP is not necessarily the IP address of the network card, because the public network IP address is scarce the number of domestic computer Internet, usually through dial-up or port mapping. Multiple intranet addresses are mapped