On the internet to see a lot about Linux optimization of good articles, here I do not repeat these articles, I just want to from my own experience to talk about this aspect of the problem.
As a system administrator, I'm talking about Linux based on server applications, because the use of Linux on personal computers may not be as secure and stable as the server,
This chapter describes the memory management features of Linux, namely virtual memory and disk caching. Describe what the system administrator should consider, work, and purpose.
What is virtual memory?
Linux supports virtual memory by using disk as an extension of RAM, allowing available memory to expand effectively. The core saves the memory blocks that are not currently in use to the hard drive, freein
first, prepare for work:
1, purchase or download Red Banner Linux Desktop version 4.0 of the installation CD or image files.
Download Address:
http://www.redflag-linux.com/xiazai/xiazai.php?id=1325
2, in the hard drive at least 2 partitions to the installation system, the mount point of the partition recommended more than 4G, the swap area is not too large in the 200m-600m or so, file system format regardless, anyway, the installation process will be
The figure below is that when we open "count My Computer" in Windows, I see a letter:
Under Linux, we don't see these characters, we see folders (directories):
In the early Unix system, each manufacturer defined its own UNIX system file directory, which is rather confusing. Shortly after Linux was published, the file directory was standardized, and in 1994 the root file directory was uni
First unitIntroduction to Computer operating systemsWhat is the operating systemWhat is the kernel of the operating systemTwo operating system user interfacesPreparations for installing the Linux operating systemLinux distributions (CENTOS, RHEL, FEDORA, UBUNTU, SUSE)The relationship between Rhel and CentOSWhy Choose red Hat Enterprise LinuxInstalling the Linux operating systemGraphical installationMinimize
Tags: Linux php java pythonThe 1th chapter of the course introductionThe contents of this chapter will give you all the knowledge of this course browse through .The 2nd Chapter Linux IntroductionThis lesson will bring you together to learn about the Linux distribution history, the application areas of Linux, and the le
[Linux] Linux system (process management) and linux System Process Management
Process: When we run a program, Linux creates a special environment for the program, including all the resources for running the program. This environment is called a process.
Foreground process: Generally, some commands belong to the for
[Linux] Linux system (login, exit, password repair), linux Password
To log on to linux, enter the user name and password and press Enter.
Change Password
Use the passwd command to enter a new password and confirm the password. The password rules are strict. Try multiple times.
Run the whoami command to view t
[Linux] Linux system (File Operations), linux System File Operations
Linux has three file types: common files, directories, and device files.
View files
Use the ls command to get ll and view the file list. parameters:-l (list form) and-a (display hidden files)
Use metacharacters *? To view the list of matched fil
First, replace the file1. Op.txt is known to exist in the/root/data, how to copy the/root/afeng/op.txt to the data directory and replace2.1[[email protected]/]# \cp/root/afeng/op.txt/root/data/2.2[[email protected] ~]#/bin/cp/root/data/op.txt/root/afeng/Second, VIM's shortcut keysG reach the bottomGG arrives on the first floorO Go to the downstream editorU undo: Wq Save and exit: q! Forced exitThird, set the alias1. Why alias is setSafety: To enter a crowbar when using dangerous commands2. The f
Install jdk in Linux -- Jdk installation and Linux jdk Installation
One of the essential skills for Java software engineers: Install JDK in Linux
For programmers who choose to develop applications in Linux, installing Jdk in Linux is one of the essential technologies. Here,
This article explains how to enter the linux command line in linux. In the graphic interface, ctrl + alt + space. if you want to see the menu when you start it in linux, you need to modify the file again, or in do
This article explains how to enter the linux command line in linux
The following describes the basic Linux command df and the du command parameters in linux. I hope this will be helpful for your learning. Df command parameters in linux: In linux, df command parameters are used to view the status information of the Linux file system, and dis
Linux under the ADB drive problemLinux under the use of mobile phone USB debugging mode to connect ADB to the Android program debugging, configuration driver without windows to intuitive.The first step is to confirm that the phone is connected to the computer, LSUSB check the device record.[Email protected]:~$ LsusbBus 007 Device 009:id 18d1:4e12Bus 007 Device 001:id 1d6b:0002 Linux Foundation 2.0 root HubB
How to use and run PHP scripts from the Linux command line, the Linux command line PHP script
The following is an illustrated way to share with you under the Linux command to use and run PHP scripts.
PHP is an open source server-side scripting language, originally three letters representing the "Personal Home page", and now stands for "Php:hypertext preprocessor
In Linux, there are many compression commands. Using these compression commands, you can easily download large files from the network. At the same time, we know that the Linux File Extension has no special significance. However, because there are many compression commands in Linux, in order to facilitate memory, some special naming methods will be performed on th
1. Linux link conceptLinux links are classified into two types: hard link and symbolic link ). By default, the ln command generates a hard link.
[Hard connection]Hard connection refers to the connection through the index node. In a Linux File System, a file stored in a disk partition is assigned with an index node number (inode index) No matter what type it is ). In Lin
Linux Command details-less command, linux Command details less
In Linux, there is also a command similar to the more command-less command, which is more flexible and powerful than the more command. Today we will introduce the less command in Linux.For more information about Linux commands, see the quick query manual fo
Linux basics [Article 9] and linux basics Article 9
Architecture of adding three disks to the server
Note:
1. linux caches the physical memory that is not used by the system. Therefore, 859 is not the actual memory of the system.
2. The real available system memory is 921.
3. buffers is the write buffer, and sync writes the buffer data to the disk.
4. the cach
Linux Study Notes (14) file system management and linux Study Notes1. Review partition and System (1) Partition types
Linux partitions generally include primary partitions, extended partitions, and logical partitions. Where:
A maximum of four primary partitions can be created;
There can be only one extended partition, or one of the primary partitions, that is, th
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