Linux

The Linux kernel uses a method originating from Solaris, but this method has been used for a long time in the embedded system. It allocates the memory as an object by size, it is called slab High-speed cache. The goal of memory management is to

There are many classic and useful commands in Linux, among which there are many commands for processing text. After decades of baptism, these gadgets have now become a classic, and have become a standard under Linux. In fact, they have always

Many beginners think that the Linux operating system is difficult to use. Now, we compare the basic operations in Linux with those in the DOS operating system as follows to get started as soon as possible. [1. Preliminary knowledge]1. [system

First, we will study the top-level directory of the Linux source code tree, which is usually but not always located in/usr/src/linux- . We will not study it too detailed, because the Linux source code often changes, but we will try to make the

I am engaged in Linux training, so I have a lot of contacts with new Linux users and have a profound understanding of the problems encountered during Linux beginners, first, a friend who learns Linux can forget Windows, and at least forget the drive

The Linux operating system was born very early, but has been widely used in recent years. It has evolved from a research system to an application system that is easy to master. The open features and free software of Linux have become more and more

BootLoader is the first step in software development of embedded systems. It connects the operating system and hardware platform together and is very important for subsequent software development of embedded systems, it also occupies a considerable

1. Read the MBR information and start the Boot Manager. In Windows, NTLDR is used as the Boot Manager. If multiple versions of Windows are installed in your system, you need to select the system to enter from NTLDR. Linux usually uses the powerful

Git-cola is a cross-platform Git front-end (GUI ). It supports running on Linux, Windows, Mac OS X, and other platforms. Currently, Git-cola includes diff, commit, search, merge, stash, repository ops, and branching. For those who still don't

When I get used to vi, I want to make everything vi. I have used various task management software, including Outlook, KOrganiser, and Evolution, tried todo.txt and Dev Todo recommended on this site, and tried tdl for a week, I can't say that tdl is

This document describes how to install GAMIT in a Linux operating system and how to use it in conjunction with an instance. 1. Introduction With the development of GPS technology, it has been widely used in many disciplines, such as land survey,

It may be inconvenient to use Linux at first, but it will become more and more convenient after a period of time to control some skills. The following are some of the experiences and skills accumulated by Using Linux. 1. Use the virtual

We are familiar with the file search function in windows. However, when developing a program on the linux text interface, commands that implement the same function are often unpleasant. Now I will introduce how to perform the find command in this

Kernel Optimization after linux Installation Kernel. shmall = 268435456 Net. ipv4.tcp _ syncookies = 1 Net. ipv4.tcp _ tw_reuse = 1 Net. ipv4.tcp _ tw_recycle = 1 Net. ipv4.tcp _ fin_timeout = 30 Net. ipv4.tcp _ keepalive_time = 1200 Net. ipv4.ip _

Recently, when optimizing oracle, I encountered that the size of oracle's SGA is much larger than the maximum shared memory in linux, so that when I run the ipcs command to view it, oracle's SGA partition is divided into 10 segments, which greatly

The following describes how to use the dir command parameters in linux. In linux, the dir Command Parameter Function is as follows: In linux, the dir command parameters support the following command formats: DIR [filename] [/O [sortorder] [/S]

Get Help Command Help Command: help | after receiving other internal commands, you can directly enter the help command to query the information of Internal commands. -- Help Command -- help is mainly used to view the external command. The command is

Alias displays all current command aliases alias lm = "ls-al" command aliases unalias lm cancelling command aliases Type is similar to which Exprot to set or display environment variables Exprot PATH = "$ PATH":/sbin Add/sbin PATH Echo $ PATH:

Linux Kernel vulnerabilities have recently exploded in almost January 1. In August 15, A Kernel Vulnerability was created to kill almost all versions of all kernel architectures. Today, on the day when students return to school, it turned out to be

Curl is the next powerful http command line tool in Linux and has powerful functions. 1) read the webpage $ Curl linuxidc.com "> http://www.linuxidc.com 2) Save the webpage $ Curl http://www.linuxidc.com> page.html $ curl-o page.html