practical guide to linux commands

, the higher the version number, the more powerful the function. Version number is divided into two series: one is the product line, with even name, for example, 1.2.x, 2.0.x, 2.2.x, etc., run stable, has been more thorough testing; another is the development of Test series, named after the odd, for the latest features of the test, not recommended for beginners and production process use. 　　 In the later part of this article, the upgrade process of kernel 2.0.34 to 2.2.14 is described in the ste

Embedded System Linux kernel Development Practice Guide (ARM platform) book reviews I am deeply touched by the heavy book embedded Linux kernel Development Practice Guide (ARM platform. This book was finally published by my editors and the joint efforts of many Parties. Looking at the exquisite finished book, I felt u

open, close does not say, each read a string must be prepared a buffer, ready to waste space, prepared for a short fear of buffer overflow, abuse heart. With bash, that's really handy.6. It's a no-no dynamic language. Oh, the eval command is too powerful, see, the analog pointer to look up the table:Of course, since Bash 3, bash itself provides the ability to refer indirectly (using "${!var}").　　Exception:The bash language is not perfect in all respects, and there are a few special exceptions.

you look at the system time and hardware time, they are the same unless you change the system time. When your CMOS power is low, the hardware time may be incorrect.You can also use the hardware clock to set the system time as follows.$ sudo hwclock--hctosysYou can also use the system clock time to set the hardware clock time as follows.$ sudo hwclock--SYSTOHCTo see how long your Linux system has been running, you can use the uptime command.[Email pro

. Configure, compile, and install a new kernel For each of the following ways, you should refer to the instructions in the Gentoo manual for configuring the kernel and configuring the bootstrapper. The following is an overview of the required actions: Mode one: Automatically set the kernel with Genkernel If you are a genkernel user, you just need to repeat the steps you made the first time you installed the kernel. Normal operation Genkernel on the line: Code 5.1: Running Genkernel

association learning, such as which, whereis, type, locate, find. 4. several tips. man, info, -- help,-h See help information; B. man-k keyword; apropos keyword view related commands Based on keywords; c. use a text file; d. good at breaking down tasks into several simple subtasks. e. master pipelines and IO redirection; 5. command learning steps www.2cto.com S1: man cmd or cmd -- help first understand its basic purpose; S2: read its options, practic

Reproduced from: http://blog.csdn.net/intlgj/article/details/8575192 Introduction to Linux File system architecture The Linux operating system has some fixed directories. The directory structure of various Linux distributions is not exactly the same, but there is no big difference. Knowing the role of these catalogs is helpful not only for your disk partitioni

practical work, in your future study or work, you will often deal with the following tools, listed below are learning C language programming often used in software and tools. (i) Operating system Learning C in a UNIX or Linux system is convenient, so please select a UNIX or Linux operating system before starting your learning journey. Currently available for

Linux hardware 3D acceleration Guide 1. Explanation What is hardware 3D acceleration? Why do I need it? With hardware 3D acceleration, 3D rendering will be performed using the graphics processor on the graphics card without occupying valuable CPU resources for 3D image rendering. It is also called "Hardware acceleration" rather than "Software Acceleration", because without this 3D acceleration, your CPU can

suspicious activities and rootkits ◆ Call the server drive from external Mount The following is a description. Penetration Test Penetration Testing helps you identify vulnerabilities on your servers and evaluate the overall security of your devices. This evaluation is the basis of any form of security audit. It provides practical conclusions on how to improve server security and provides important information about the scanning focus for the upcoming

Article Title: Linux kernel debugging tool: Kdb Application Guide (3 ). Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source. Author: Hu FengHua 　　 Format 2: mdWcn 　　 By default, md reads

When learning Linux, we will encounter many problems. Understanding some Linux practical skills and mastering Linux practical skills is helpful for you to use Linux systems more conveniently. 1. Process special file names Suppose

6.3 automatically executes every 5 minutes using timed Tasks [[emailprotected] ~]# Echo ' */5 * * * * */usr/sbin/ntpdate ntp1.aliyun.com >/dev/null 2>1 ' >>/var/spool/cron/root [[email Nbsp;protected] ~]# crontab-l ===> This command is actually writing a timed task, equivalent to executing crontab-e then adding content #time sync by Xningge at 2017-12-24 */ 5 * * * */usr/sbin/ntpdate ntp1.aliyun.com >/dev/null 2>1 7. History count and login timeout environment variable settings7.1 Set Idle

, Linux memory management mechanism, Linux process management mechanism, Linux kernel link list mechanism, Linux system call mechanism, Linux character device-driven development method, Linux Network device-driven development meth

Original directory target directory---Rename files or directories, or move filesIf you move the logs file to the current log directory: mv/usr/local/mongodb/logs/usr/local/mongodb/log/Df-h Viewing disk space information(-H is the same as the-h parameter above, but the capacity is converted by 1000 instead of 1024 at the time of the initialization)RM deletes files in the specified directorymkdir Creating a DirectoryTouch Create FileCd.. /Return to SuperiorCD Specifies the directory address to ju

ArticleDirectory Linux R D practice performance monitoring tools Abstract:This article summarizes eight very practical Linux Command Line performance monitoring tools. These commands support all Linux systems and can be used not only to monitor the system,

Linux Command user management commands, linux Command user management Groupadd [Function description] Create user group [Syntax format] Groupadd [-f] [-r] [-g [Option parameters] Parameters Description -F Create an existing group and force the system to receive existing group names. By default, each group name should be unique in the syst

Instance(1) If you want to quickly format a floppy disk, run the mformat command:Mformat:MtoolsIt was originally developed to process DOS file systems, so it can only be used in partitions in the FAT file format. Note that if the FAT16/32 partition is mounted using the mount commandYou cannot use mtools commands to process files in these partitions. This is because once the FAT16/32 partition is mounted to the Li