Linux

Have you ever taken a detour on the path of LAMP or LNMP source code compilation? Have you ever failed or have not been installed yet? In addition, there are a lot of one-click installation scripts for LAMP/LNMP on the Internet. If you take them,

Install hdparm: yum installhdparm Display hard disk settings[Root @ cnscn ~] # Hdparm/dev/sda/Dev/sda:IO_support = 0 (default 16-bit)Readonly = 0 (off)Readahead = 256 (on)Geometry = 19929 [number of cylinders]/255 [number of magnetic heads]/63

The default SSH port number of each CentOS release is 22 by default. If it is used for other purposes, you need to modify the default SSH port number to improve security.Password. Some VPS providers may be fined or temporarily terminate services if

Df Command help informationUsage: df [Option]... [file]...Displays information about each file system. By default, all file systems are displayed.Long Options are required when short options are used.Option-A, -- all includes a file system with a

When you use SSH Secure Shell to connect to centos, if you do not perform any operation in a few minutes, the connection will be disconnected. You must log on again. It is annoying to repeat the same operation every time. This annoying problem can

Timeout is a wonderful Linux Command that can control the running time of the program, which is very useful for controlling the running time of the program. Timeout on the CentOS 6 platform, from the software package coreutils # which

Mount | grep partition name to check whether the partition supports disk quota Mount-o remount, usrquota Vim/etc/fstab Default, usrquota, and kgquota are enabled permanently Quotacheck-avug scans the file system and creates a quota record -A: All

Function Description: set the time zone. Syntax: timeconfig [-- arc] [-- back] [-- test] [-- utc] [Time Zone name] Note: This is a program developed by Red Hat following the GPL rules. It has an interactive operation interface that allows you to

The configuration file/etc/ssh/sshd_config contains this series of single-line statements. Each line Declaration starts with a keyword (Case Insensitive), followed by a space, and finally a parameter (case sensitive ). To make these changes take

Head Name: head-output the first part of files upper part of the input document Syntax: head [option] file Function Description: head and tail are very straightforward. They are used to display a certain number of text blocks at the beginning and

Pwd (Print Working Directory) Name: pwd-print name ofcurrent/working directory enter the current working path Syntax: pwd [option] Parameter: -- help -- version Instance: 1) display the current working path [Root @ localhost ~] # Pwd /Root 2)

A major advantage of Linux is that you can implement the same thing in hundreds of ways. For example, you can generate a random password in dozens of ways. This article describes ten methods to generate a random password.These methods are collected

Today, let's talk about how to build a PPTP-VPN in linux, PPTP (Point to Point Tunneling Protocol), that is, Point to Point Tunneling Protocol. This protocol is a new enhanced security protocol developed on the basis of the PPP protocol. It supports

1. Concept of average load in Linux Sometimes we feel that the system response is slow, but we cannot find the cause. Now we need to check the average load to see if there are a large number of processes waiting in the queue. The average number of

Service OverviewIn a linux operating system, you often need to create some services which are made into shell scripts. These services must be automatically started when the system starts and closed.In the/etc/rc. d/init. d directory of the script to

This article lists the network and monitoring commands that every Linux user should know about. The network and monitoring commands are similar to the hostname, ping, ifconfig, iwconfig, netstat, nslookup, traceroute, finger, telnet, and ethtool

I. File System Knowledge supplement A file system is a mechanism used to provide users with underlying data access. It divides the space in the device into blocks (slices) of a specific size, typically 512 bytes each. Data is stored in these blocks,

I have been using CentOS for a long time. However, after using CentOS for a period of time, I feel that the system partition is not very reasonable. I would like to share it with you even if I have summarized it for myself.I. Descriptions of Common

After Fedora14 is installed, sudo is not enabled by default. You should first set sudo.The role of sudo is to allow the current non-root user to directly add sudo to the command before using commands without permissions, and then enter the password

To improve the transmission efficiency of TCP, we recommend that you customize the CentOS kernel to improve the transmission efficiency. The following describes how to obtain the source code and compile the kernel. 1. Run the [root] user to install