Linux

After the operating system starts, some services and programs are started automatically. Some of these programs are not required for the server to function properly.For the server, running redundant services and programs, which do not add points to

1 Installing the JDKDownload jdk-8u121-linux-x64.tar.gzmkdir/usr/local/java/Unzip to/usr/local/java/cd/usr/local/java/; Ln-s jdk1.8.0_121 JDK2 Installing TomcatUnzip apache-tomcat-8.5.15.tar.gz to/usr/local/tomcat3 Edit/etc/profile Add the following:

Locate Usage: Locate file name Search by file name in background database, search faster, database is/var/lib/mlocate UpdateDB: Updating the database Search by file name only Whereis command to search for commands

Background:When we develop Linux online server, we often encounter the problem of handle leaking. Because in the Linux system design to follow everything is the principle of the document. That is, disk files, folders, network sockets, disks,

1, LS2. PWD Displays the current directory location3. Date datetime4. Cal CalendarThe current month is displayed by defaultCal 2012: View the 2012 calendarCal Month Year: View calendar for a month of the year5. BC CalculatorBC Default execution

1. Determine the log file name and path of the online server2, a local server can connect the public network, create a log account, set the password3, the online server requirements: A. Determine if the Sshpass package is installed[Email protected]

Today encountered a strange problem, the same script, manual execution No problem, added to the crontab, there is no running situation, the first reaction is the environment variable problemEnvironment Description:Operating system: CentOSUser: Test

Main idea: Using Ssh-keygen to generate RSA key pair, there are two waysOne. Generate a key pair by the client, the corresponding "lock" to the server (login target)1. The client generates a key pair, generates a key pair default path ~/.ssh,

Methods of breaking password:Method 1. Single- user mode changes Power on press SPACEBAR to enter edit state. Press e e key edit, press SPACEBAR to enter 1 (means enter into single-user mode) b Key to start, enter single-user mode.

View PATH: Echo $PATHUse the ENV command to display all environment variables : $ envuse the SET command to display all locally defined shell variables : $ setUse the unset command to clear environment variablesSet sets the value of an environment

Background: Sometimes we copy files between two hosts, prompt for password, very inconvenient, how to avoid password copy it? is to use the Linux public key and secret key to establish a two-machine trust relationship.1. Generate the secret key and

In Linux, the color of the file is meaningful. whichBlue indicates directoryGreen indicates an executable fileRed indicates compressed filesLight blue indicates a linked fileGrey means other filesFlashing red indicates a problem with the linked

Compress an entire Directory or a single FileUse the following command to compress an entire directory or a single file on Linux. It ' ll also compress every other directory inside a directory of your specify–in other words, it works recursively.TAR-

In the enterprise management of the Linux server, you have to face a problem that is the partition, next to share with you how to properly manage the disk.Partition Table TypeMBR 4 Primary partitionsGPT supports 128 primary partitionsBased on MBR

First, Concept introductionLinux systems typically use the free command to view memory usage, and the free command is primarily read from the/proc/meminfo file and then presented in simple processing, based on the manual of the View Free command to

Linux is a free and open source Unix-like operating system that uses the Linux kernel. There are many different Linux distributions that can be installed on a wide variety of computer hardware devices, from phones, tablets, routers and video game

Iso/osi modelThe OSI seven-layer framework acts on the application layer: the layer presentation layer of the user operation: the conversion between the binary data and the display data, and also the encrypted local session layer: determining

Install and use the percona-toolkit (ultra-detailed version) and perconatoolkit in linux  1. Check and install Perl-related modules The PT tool is written and executed in the Perl language. Therefore, the system must have a Perl environment. The

MySQL uses the pt-online-change-schema tool to modify the 0.16 billion-level data table structure online, ptonlinechangeschema AbstractTo:This article describesMySQL DDLStatus Quo,Pt-online-schema-changeWorking principle, And actual

The jdk file downloaded from the oracle official website in Linux is not a standard gzip file.The escape or tar. xz format cannot be avoided because someone may accidentally change the name after compression. Bytes. You can run the file command to