Linux

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For Linux system security, log files are extremely important tools. The system administrator can use the logrotate program to manage the latest events in the system. Logrotate can also be used to back up log files. This article will introduce the

The basic idea of locking and unlocking is that when a process enters the critical section, it will hold a certain type of lock. in UNIX, it is generally semaphore, and in Linux it is generally semaphores, atomic weights, or spinlock ). When other

Linux Command Line has powerful functions. For skilled Linux system administrators, they only need to combine various techniques to form a complex command to complete user tasks. How can a complicated Linux Command be made up? The following

◆ 1. btsoftware azureus in Linux 1. First download the azureus_2.4.0.2_linux.tar.bz2 package and jre package You can go to http://azureus.sourceforge.net to download 2. Install the java environment. refer to the previous article firefox. 3.

Simple Network Management Protocol (SNMP) is a Simple Network Management Protocol. It provides a framework for the Network Management system to manage the underlying Network. The SNMP protocol is widely used in many types of network devices,

When configuring the network, you must specify the path through which the packet is received for the machine. In Linux, a command Route is provided, which can be used to set a static Route for the NIC configured by the ifconfig command. This setting

You cannot copy a database because, once the database is damaged, copying its files is useless !! The following describes how to back up and restore a database using the doscommand: 1. mysqldump backup:Create a new blank table = clear table =

For Linux, we often need to check the traffic of Linux traffic monitoring. Linux traffic monitoring is still quite common. So I studied some methods of Linux traffic monitoring, I would like to share it with you here and hope it will be useful to

The implementation of Linux virtual memory requires support of six mechanisms: Address ing mechanism, memory allocation and recycling mechanism, cache and refresh mechanism, request page mechanism, swap mechanism, and Memory sharing mechanism.1)

Some people may think that the Windows operating system is upgraded faster. In fact, the Linux system kernel is upgraded much faster than the Windows operating system. Generally, a new version of the kernel is released every other month. It is

Our article "Learn Linux, 101: Hard Disk layout" introduces the layout, partition, and usage of hard disk drives.fdiskCommand to view the basic knowledge of partition information. You learnedPrimary Partition,Extended partitionAndLogical

Using sugroup allows the system administrator to restrict who can access which account by using su through group members. You can use the NOT operator to further restrict access control. When being audited, you need to report on the sugroup members

PostfixadminIt is a Web-based Postfix mail sending server management tool. You have used the mailbox's automatic reply function. How can we implement it on Postfix? Ask the Postfixadmin management tool for help, see the following. 1. Create a local

Yesterday, I checked the Nagios alarm information and found that one of the servers had heavy CPU load and the machine was CentOS. The information is as follows: (Tuesday) 17: 50 WARNING-load average: 9.73, 10.67, 10.49 There are also alarm messages

Unsolicited Bulk E-mail, UBE, or Unsolicited ad-mail, UCESpam"(Spam), the sender sent a large number of (annoying) emails to a large group of unfamiliar recipients without prior consent from the recipient. Such behavior is called" spam ",

QmailThere are many advantages. Please refer to the following section. Practice has proved that Windows NT-based Exchange Server is not the best choice for enterprise-level email systems. Because of the high requirements on stability and other

I saw some of my friends on the Forum saying:VsFTPdThe server can be started normally, but it cannot be accessed or the user cannot upload files. I think it should be a firewall or SELINUX event. The FTPD server may be protected by the firewall or

  Figure-FileZilla FileZillaGroup Management Group Management is to place multiple different FTP servers in the same group (equivalent to a directory), which facilitates user management. When creating a site, we can create a group first, and then

IptablesThe source code is cumbersome. I hope you can understand it! I. Display rules First, describe the display of the rule, because it involves a simple and comprehensive understanding of the display of the rule, it is easy to understand other