Linux

1. First to the PHP installation package, below is a file called ext,650) this.width=650; "Src=" https://s1.51cto.com/wyfs02/M02/9C/30/wKioL1ltdKGgNT_lAAC8aMIdsEI631.png-wh_500x0-wm_ 3-wmp_4-s_2842556301.png "title=" 1.png "alt=" Wkiol1ltdkggnt_laac8

installing mysql_5.6 in Linux systemsinstallation package (Http://pan.baidu.com/s/1o8G5qmI)1.Linux create a normal user and assign permissions (root user action):Create user group: groupadd MySQLCreate user and assign group: useradd-g mysql mysqlSet

3.1 Linux File informationInode and directory entries1, what are inode and directory entriesThe minimum storage unit for a file on the hard disk is called a sector, and each sector stores 512 bytes. When the operating system reads the hard disk, it

These days just came into contact with Linux, a VMware virtual machine installed on Windows, Centos7. The installation was done by Jia and colleagues in the office.In the virtual machine interface, press the shortcut key Ctrl+alt+enter, you can

Explanation of the contents of the command output of the view process under LinuxPS (Process status)Ps-e or Ps-a (E and-A are exactly the same)PID           TTY         time     Cmdps-efuid     &NBSP ;    pid            ppid           C       & nbsp

File class:1, create directory: mkdir Example:sudomkdir test2, create an empty file: touch Example:sudoTouch Test.txt3, delete files: RM Delete files do not need to confirm: RM- FCases:sudoRm- FTest.txt recursively Delete directories and sub-files:

set Linux kernel parameters/etc/sysctl.conf Configure Linux kernel parameter modifications without restarting the update:/SBIN/SYSCTL-POpen/etc/sysctl.conf Copy the following:Kernel.shmall = 2097152Kernel.shmmax = 2147483648Kernel.shmmni =

awk ' Condition 1{action 1} Condition 2{action 2} ... ' FilenameConditions:BEGIN executes before the first line of data in the file is processedEnd executes after processing the last line of data in the fileBoolean expressions are generally judged

After the system is installed, you can practice it now. View CPU Information command: LSCPU 650) this.width=650; "Style=" border-style:none; Background-color:rgb (255,255,255); "alt=" Qq20170715085155.png "src="

1. AliasDefine or display aliasesegAlias date= ' Date ' +%f%T "' When we enter date , in fact, it is equivalent to enter the date "+%f%T", simple and convenient;However, this alias is only valid in the current shell process, and once we

The Linux kernel exports kernel information to the user through the/proc virtual file system, and the user can dynamically configure the kernel either through the/proc file system or through SYSCTL commands. For example, if we want to start NAT, we

Function: Query native IP/MAC address, filter out 127.0.0.1 loop-back addressFor: Linux, Ubuntu 16.04 Debug Pass#include #include #include #include #include #include #include #include #include #include #include #include #include #include #include

(1) ACL permissions1. See if the partition ACL permission is on: Dumpe2fs-h/dev/sda3-H displays only the information in the Super block, not the details of the disk block group2. Temporarily turn on partition ACL permissions: Mount-o

/bin/nologin,/bin/false means that a user is forbidden to log on.More common uses:#/usr/local/apache-g apache-s/bin/false ApacheTo deny a system user login, you can set its shell to/usr/sbin/nologin or/bin/falseUsermod-s | --shell /usr/sbin/nologin

Underlying file access:Process: A running program that has a number of file descriptors associated with the value, and how many file descriptors depend on the configuration of the system.When a program starts running, three file descriptors are

Due to the need to remotely transfer the file a server to the B server but the SCP command to manually enter the password each time so that the script execution is too cumbersome, so that a server and B server Trust can be, the specific operation is

My First Linux ModuleToday, I successfully build my first Linux Hello module.First of all add a directory named Hello in the Kernel/driver, and add a file hello.c, write codes like bellow:#include #includeStatic int__init Hello_init (void) {PRINTK

This article transferred from: http://www.linuxidc.com/Linux/2016-05/131749.htmOne, view the Linux kernel version command (two methods):1, Cat/proc/version [Email Protected]centos home]# cat/proc/versionLinux version 2.6.32-431.el6.x86_64 ([

Usage of the Linux Date commandIn Linux shell programming, the addition and subtraction of dates is often usedI used to use the expr function to calculate the problem.Actually, the date command itself provides the addition and subtraction of

Nginx smooth upgrade, nginx Original article published on:Reprinted to cu on: 2012-07-21 I have nothing to worry about upgrading the nginx server, because I have not often used linux, so I will record it so that I won't check the information when I