Linux

As with Windows system, Linux operating system will also have many problems and failures, many Linux novice are afraid of failure, face the problems appear helpless, and even, thereby giving up Linux, in fact, we should not fear the problem,

1. The first definition of pthread_cond_wait is this The pthread_cond_wait () and pthread_cond_timedwait () functions are used to blocks on a condition variable. They are called with a mutex locked by the calling thread or undefined behaviour would

A Overview This article describes a way to transfer files between a Linux host and a Windows host. Because sometimes, some files in a Linux host may be used in a Windows environment. For example, in the Linux host grabbed some pictures, want to

Linux root password forgotten, how to recover? Although this is not a very common situation, but you have not logged into the system for a long time will forget it. Do not say is the Linux root password, on the ordinary account and password you have

What is Openvswitch Openvswitch, abbreviated as OVS, is a virtual switching software that is used primarily for virtual machine VM environments, as a virtual switch that supports Xen/xenserver, KVM, and VirtualBox virtualization technologies. In

The Tomcat server is a free open source Web application server and is the first choice for developing and debugging JSP programs. For a beginner, it can be argued that when you configure the Apache server on a single machine, you can use it to

CAT/ETC/PASSWD View Linux User Cat/etc/shadow View user password requires root permission CAT/ETC/PASSWD View Linux Users Cat/etc/shadow View user password requires root permission Cat/etc/sysconfig/network-scripts/ifcfg-ethn N represents the

Currently, the most common mail service protocols on the network are SMTP (send protocol) and POP3 (Receive protocol). First, start SMTP: After you install and start the SendMail service, SMTP should be turned on. If the letter is not sent out, it

E-mail is the most important means and tools of communication on the Internet. From the day the e-mail was born, boring spam has become one of the most vexing problems. It is said that the world's annual loss due to junk e-mail is as high as $

Proxy server is the function of network users to obtain network information, it is a transit point for network information. With the widespread use of proxy servers, a series of security issues followed. Because there is no comprehensive and

The default state gftp is not set character encoding, so we on the FTP, see inside the Chinese file name is all garbled, or not part of the file see folder but no name; In fact, after the gftp-2.0.17 version has been very good support for Chinese

A firewall (Firewall) is a software or hardware product that establishes a security barrier between a trusted network and an untrusted network. The Linux operating system kernel has packet filtering ability, the system administrator sets up a set of

A preface This paper focuses on the difference between the different implementations of firewalls under Linux, taking IPChains, Iptables, checkpoint FW1 as an example. Two basic concepts 2.0 Before I get to the point, I will devote a little space to

What is APF? apf:advanced Policy Firewall is a software firewall in the Linux environment produced by Rf-x Networks. APF uses the Linux system default iptables rules. APF can be considered one of the most famous software firewalls in Linux. Download

Firewall is an important content of network security research, data packet capture is the premise of packet filtering firewall, this paper studies the data Packet capture module of personal firewall based on Linux host, and discusses the structure,

One of the notable differences between Linux and the Windows operating system is the diversity of directory schemas. The directory architecture of the Linux operating system follows file system hierarchy standards. I wonder if you use the LS command

There are two ways to find files: First, locate: not real-time search, fuzzy matching, search based on system-wide file database; fast # UpdateDB: is to manually generate a file database; fast Second, find: real-time search, accurate matching,

On the Chinese platform, users can add their own input method. The design of the input part of the Chinese platform uses a leading module as the interface with the platform, and it adopts a unified and normative interface with each Input method

Recently because of testing purposes to traverse a directory of all the files under the operation, mainly read the contents of each file, as long as you know the filename OK. It can be done directly in Java with the file class, because the

Gzip A compression command that is more commonly used under Linux to compress a file into a compressed file with a. GZ ending Preparatory work [Root@localhost etc]# Cp/etc/man.config/tmp [Root@localhost etc]# Cd/tmp [Root@localhost tmp]# LL