Cloud Servers

A few days ago in QQ Group, a friend asked about how to lossless disk partition in Linux to adjust the size of the problem, in the actual use of this problem I have explored, so I am more concerned about how lossless adjustment of the disk partition size, without losing data! Http://www.aliyun.com/zixun/aggregation/32995.html "> In Windows, I used the Bootstar software, through the software record the hard disk partition ID, you can achieve the points ...

The latest Red Flag Asianux Server 3 retains the remote installation via VNC, enabling administrators to remotely control the installation process. First, you need to enter Linux VNC to start the VNC installation process at the boot: prompt after a successful boot. To set the password you need to add the Vncpassword parameter, as follows: Boot:linux VNC vncpassword=redflag Setup will start as normal installation. First of all...

Ssh™ (a Secure shell abbreviation) is a communication between two systems based on the client/server approach and http://www.aliyun.com/zixun/aggregation/18736.html "> Allows a user to log on to a protocol that is remotely controlled on the server host. Unlike other remote communication protocols, such as FTP and Telnet, SSH encrypts a logon session so that intruders cannot collect encrypted passwords. SSH is used to replace the original ...

At this point, Red Flag asianux Server 3 's basic system has been installed, as prompted to restart the computer, after a normal power check, you will see the Graphical Grub boot menu, then you can do is as follows: Press the <Enter> key, The default boot option is booted, a Boot tab entry is selected, the operating system that corresponds to the selected boot tag is booted by the <Enter> key, and no action is taken, the boot loader timeout expires (five seconds by default), and automatically boots ...

Security is the basis of reliable operation of network server. With the widespread use of http://www.aliyun.com/zixun/aggregation/26684.html > Communications Technology and the Internet, server attacks can occur frequently, and security threats from the network are The main source of Linux server security issues. This chapter describes how to use the system-supplied Ann ... on the server platform built by Red Flag Asianux server 3.

This chapter is a high-level topic in the installation manual. In general, we use U disk or CD-ROM to boot the installer. However, if you encounter a computer without an optical drive or USB device interface (or if you are using a non-standard USB device and optical drive), you can use the PXE installation method. In addition, PXE installation is an efficient way to work when a large number of computers need to install the system at the same time. 4.1 What is PXE strictly speaking, PXE is not an installation, but a way to boot. The prerequisites for PXE installation are the computers to be installed ...

VIM since its inception, after constant innovation, now the latest version of Vim has a very powerful function, so that users can more easily and conveniently use it. 5.1 Vim's working mode 5.1.1 Command mode is in command mode when you start to enter Vim, press <ESC> to return to command mode if you are already in insert mode or last line mode. In this mode, you can only use the key command, you cannot enter text. 5.1.2 Insert mode insertion mode is to insert the text into the file to be edited, insert position according to the command used ...

1.6 Process and job control commands simply put, a process is the process of executing a program or task. In a Linux system, executing any command creates one or more processes. That is, the command is implemented through a process. The multitasking concept of Linux operating systems can be better understood from a process perspective. For http://www.aliyun.com/zixun/aggregation/13879.html "> System administrators, the management system process is an important part of day-to-day management." Use a.

1.4 File permissions operation in a multi-user operating system, for security reasons, each file and directory need to be given access rights, and the permissions of each user are strictly defined. At the same time, users can give their own files the appropriate permissions to ensure that others can not modify and access. 1.4.1 Change File Master Linux assigns a file owner to each file, called the file Master, and the control of the file depends on the file master or Superuser (root). The creator of the file or directory has special rights to the files or directories created. All relationships in a file can be changed ...

1.2 Directory Operation command 1.2.1 View directory the command for viewing directory content is LS, which displays the contents of the current directory by default, and can be viewed by giving one or more directory names at the location of the command line arguments. The syntax format for the command is: LS [options] ... [filename] ... the LS command has multiple command-line options, such as:-A: Lists all files, including those with "." First file;-D: If you are following a directory, use this parameter to output only the name of the directory;-L: Displays file entries in long format, including ...

To prevent a user or group of users from consuming too much disk http://www.aliyun.com/zixun/aggregation/17325.html > storage space, you need to limit the available storage space for users or groups of users. Disk quotas are meant to force users to keep their system disk occupied for most of the time under the quota, and to eliminate their ability to use disk space indefinitely. In the Linux system, the quota is set on the file system, the file system needs to start before setting ...

Familiarity with the command line interface is significant for using and managing Linux operating systems, and this chapter describes the knowledge of shell operations in the Red Flag asianux Server 3 system. 1.1http://www.aliyun.com/zixun/aggregation/22929.html "> Basics" The following knowledge of the Linux shell and files and directories is the basis of this chapter. 1.1.1 File name Li ...

Known-best Nick http://www.aliyun.com/zixun/aggregation/14840.html "> Virtual host," Linux virtual Host "uses one of the most popular Linux systems: the CentOS system, Installed the latest Apache and MySQL databases. As a free software system, Linux in the function and security compared to Windows has a greater advantage of PHP and MySQL program support better ...

In this chapter we will introduce the CentOS http://www.aliyun.com/zixun/aggregation/17117.html ">web server security settings, which is also a number of the most important security settings for Web services, As the administrator of the server we should develop a good system maintenance habits, regular patching, for the directory permission settings should have a very clear understanding of the user and user group management should also develop good habits, if you are just see this article ...

Swap space is a part of the system that is partitioned from the hard disk, and when physical memory (RAM) is filled, inactive pages in memory are moved to swap space. The size of the swap space is generally set to 1~2 times the physical RAM, but not more than http://www.aliyun.com/zixun/aggregation/9392.html ">2048MB." The swap space can be one or more dedicated swap partitions (recommended), can be one or more exchange files, or both ...

System security has always been our attention in the server http://www.aliyun.com/zixun/aggregation/18665.html "> Application field of the more important links, after all, normal production environment for system security level is also relatively high, Now many server operating systems choose Linux, and in this field platform is undoubtedly CentOS Linux is the industry leader, CentOS based on red Hat Enterprise Li ...

Ext3 is the log file system, which is designed as a ext2 http://www.aliyun.com/zixun/aggregation/6453.html "> upgraded version, ext3 added logging on ext2 basis. The default file system type in Redflag asianux Server 3 is ext3. 2.3.1 ext3 feature availability when an abnormal power outage or system crash occurs, ext2 can easily cause the text ...

The parted program makes it easy to manage and customize disk partitions, such as viewing existing partitioned tables, changing the size of partitions, deleting partitions, creating new partitions, and so on. &http://www.aliyun.com/zixun/aggregation/37954.html ">nbsp; changing the system's hard disk partitions is a very dangerous thing, even for experienced system administrators, We still recommend that you make the necessary data backups before changing the disk partitions. About Disk Partitions ...

It has the characteristics of compact, flexible and convenient customization. This paper introduces the function and structure of ovirt-node, as well as the acquisition, installation, customization of Ovirt-node. Ovirt-node is the client part of the open source virtualization management platform Ovirt, a customized minimized fedora system that acts as a virtual Machine Manager (Hypervisor) host, and a virtualization management platform with the management end Overt-engine. Ovirt-nod ...

Clonezilla Live is a http://www.aliyun.com/zixun/aggregation/10608.html "> hard disk Partitioning and cloning tool similar to the Symantec Ghost, It is also a bootable CD-ROM tool based on Debian. Used to save and restore the file system on the hard drive that is stopped, and for unsupported file systems, DD can be used instead. Using Clonezilla, users can get around 10 points ...