Linux

So far, the need for memory leak detection has been largely met by the method of wrap malloc, new function overloading, and calculation of pointer memory size.If a memory leak is found, then find out where the memory leaks are and fix it.Boundless

Or the old routine to say the cause of things, because the first of the various quotes under Linux is not particularly sensitive, resulting in the day I add Database field errors, the reason for the error was that I used a single quotation mark in

1:grep// Display Lines# grep ' main '/home/myhome/a.c//displays the A.C containing the main line# grep-v ' main '/HOME/MYHOME/A.C//display all rows except main# grep-n ' The ' a.c//show A.C contains the line# grep-vn ' The ' a.c//shows no Line# grep-

Lsof (list open files) is a tool that lists open files for the current system. In a Linux environment, everything is in the form of files, with files that not only access regular data, but also access to network connectivity and hardware. So, such

The previous day learned that the at command is for routine scheduled tasks that run only once, and that the Linux system is controlled by the cron (Crond) system service. Linux systems have a lot of planned work on them, so this system service is

First, the principle of introduction: 1, the basic principle of SSH public key authentication:SSH is a protocol designed to provide security for Telnet sessions and other network services. By default, SSH links require password authentication and

Server/root directory has a.list, aa.list 2 files aa.list for a.list copy 650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M01/74/CA/wKiom1Yo3JzQ39XfAACiI1CcHpk776.jpg "title=" QQ picture 20151022205228.png "alt="

Theoretical basis Stream: Call fopen Open file after file read and write operation will create a stream, socket network communication will also create a flow, the flow is a data transmission for the purpose of a bridge, in fact, refers to

Performance Test Training: 18 commands and tools to help you locate Linux performance issuesPoptest is the only training institute for developing Test and development engineers in China, aiming at the ability of the trainees to be competent in

Monitoring Linux system performance every day is a daunting task for every system/network administrator. After 5 years of Linux system administrators in the IT industry, I found it's not easy to monitor and keep the system up and running, so I've

The umask command controls the default permissions that are assigned to a file when it is created. It uses octal notation to remove a bitmask from the file-mode attribute.See the example below:0002 [[email protected] cmdline]$ Touch Foo.txt[[email

The mode of the fileWhen you use the LS-L command to view directory content[Email protected] cmdline]$ ls-l/etc/passwd-rw-r--r-- 1 root root 1917 Jul 2 15:01/etc/passwdThe first column field is the file mode. The first character represents the file

Use GNU/Linux to play TV programs At present, many things in life can be completed in front of the computer, reading books, writing programs, listening to music, watching videos, etc. It would be better if you could watch cable TV programs on your

Aircrack-ng wireless cracking summary, aircrack-ngIn linux, I use the ubuntu environment. For ubuntu installation, you can directly use sudo apt-get install aircrack-ng Linux should be able to use yum-y install aircrack-ng for installation. If its

Docker + nginx + Tomcat 7 Simple Server Load balancer ConfigurationThis article describes how to configure Simple Server Load balancer on Docker. The host machine is Ubuntu 14.04.2 LTS, two CentOS containers, Nginx installed on the host machine, and

Use Mop in Linux Command Line to monitor stock prices It is usually good to have a hidden income, especially when you can easily coordinate your part-time and full-time work. If you use a networked computer in your daily work, stock trading is a

Install a retro terminal in Linux Do you have nostalgia? Try installing the retro Terminal application cool-retro-term to get a glimpse of the past. As the name suggests,cool-retro-termIs a cool and nostalgic terminal. Do you still remember the

Use crontab to deploy scheduled tasks in Ubuntu Using php to build a website, one of which can be used regularly every week. I want to see what methods I used to look at other people's things. There are generally two methods: one is a timing task

Manage Heartbeat using CRM Heartbeat is an open-source Linux-based, widely used high-availability cluster system. It mainly includes two high-availability cluster components: Heartbeat service and resource manager. Its resource management method can

7 Suggestions for using HTTP/2 to improve performance The historical Hypertext Transfer Protocol (HTTP standard) has been upgraded recently. HTTP/2 was approved in May 2015 and has been implemented in many Web browsers and servers (including NGINX