Linux

Production of a Linux device concurrency is relatively large, droped packet more, especially in the running game packets, there is a serious loss of packet phenomenon, suspected network card performance, in the replacement of equipment before the

Wait Queue: In Linux driver programming, waiting queues can be used to implement blocking of processes. The wait queue can be thought of as a container for the save process, and the process is placed in a wait queue when the process is

1)/var/log/secure: Record the log in system Access data file; For example: Pop3,ssh,telnet,ftp and so on will be recorded here. 2)/ar/log/btmp: Record logged in this information record, has been encoded, so must be resolved by the last; For

Linux saves detailed records of events that occur in the system, which are called log files or message files. You can refer to the log file to determine the current state of the system, observe the intruder trail, and look for data related to a

First, the FTP working principle(1) FTP use port[Email protected] ~]# Cat/etc/services | grep ftpftp-data 20/tcp #数据链路: Port 20ftp 21/tcp #控制链路: Port 21(2) FTP connection modeTwo connection modes are supported: Active mode (Port) and

The zero-based Linux 20th chapterHello~~ is a week come to provoke ~ ~, small series even if busy, also want to take time to give lectures to students ~ and ... No wages yet ...You can no longer find how to work hard and love your small make-up ~ ~

A sparse file is a file in which most of the contents of a file are empty characters.The 100G disk file created by the virtual machine is, but the system does not immediately partition the space of 100G, but only to identify the virtual hard disk

Transferred from: http://blog.chinaunix.net/uid-24250828-id-3198922.html1)/var/log/secure: Record log in system to access data files;For example: POP3,SSH,TELNET,FTP, etc. will be recorded here.2)/ar/log/btmp: Record login This information record,

Recently, I had to worry about it one by one. Even my laptop that never accompanied me all the time had a bad time with me. A plug-in QQ crashed my hard drive. In the past, I tried the software and tested the software with extra caution. I installed

I. Explanation of DD commandsDD: Use a block of the specified size to copy an object and perform the specified conversion at the same time. Note: If the following column ends with a specified number, multiply it by the corresponding number: B = 512;

Install Raspbian (no router, no monitor) and raspberryraspbian on Raspberry Pi (Raspberry Pi) I. Preparations 1. Raspberry Pi Motherboard Model: Raspberry Pi 3 B Processor: quad core 64-bit ARM Cortex-A53 CPU Kernel architecture: ARMv8 2. a tf card

When learning about Linux, you may encounter a Linux partition problem. Here we will introduce the solution to the Linux operating system problem. Here we will share it with you. Boot Solaris 10, Linux, and Microsoft Windows on a portable

Nginx load balancing-expansion function (NGINX Plus), nginx Load Balancing Nginx load balancing-expansion feature (NGINX Plus). This article mainly introduces the functions of NGINX Plus, and updates across different versions such as NGINX Plus R5,

Install Cisco Packet Tracer in Linux  What is Cisco Packet tracer? Cisco Packet Tracer is a powerful network simulation tool used for Cisco authentication training. It provides us with a good interface view for various routers and network devices.

Summary of the basic operations of Linux, basic operations of linux Preface Linux was a UNIX-compatible operating system developed in 1991 and can be used for free. Its source code can be freely transmitted and can be modified, enriched, and

How to Use n2n to configure a practical and free VPN solution on Linux A Traditional VPN, such as OpenVPN or PPTP, is composed of a VPN Server and one or more clients connected to this server. When any two VPN clients communicate with each other,

OpenSSL introduction and compilation steps on Windows, Linux, and Mac systems OpenSSL Introduction: OpenSSL is a powerful Secure Socket Layer password library, which includes major cryptographic algorithms, common keys, certificate encapsulation

Daily monitoring and debugging of Linux system performance is a heavy task for the system and network administrators. Five years after working as a Linux system administrator in the IT field, I gradually realized how difficult IT is to monitor and

Cloudera Manager and CDH 5.14.0 Installation Process in CentOS 7 As we all know, the configuration of Apache Hadoop is cumbersome and fragmented. For this reason, Cloudera provides the Clouder Manager tool and encapsulates Apache Hadoop, flume,

Red Hat Enterprise Linux 7.2 operating system installed on Dell R730 Server Record the process of installing the Red Hat Enterprise Linux 7.2 operating system on the Dell R730 server. The Red Hat Enterprise Linux 7.2 architecture supports 64-bit AMD,