Linux GCC GDB section II

Previously wanted to verify some of the problems on the stack, but there is no good way, printf is really limited, flow on the surface, only the appearance (value, scope, law) do not see the real (address, register, process), so think of gdb--a

Linux Next Step installation ODB

IntroductionThis guide presents step-by-step instructions for installing the ODB system on unix-like operating systems, such as gnu/li Nux, Solaris, etc. For Mac OS X, first see Installing ODB on Mac OS X. For MINGW/MINGW64 (either directly as past

Linux Seventh Week Micro jobs


1. Write a script to determine whether the shell of all users on the current system is a login shell (that is, the user's shell is not/sbin/nologin), the number of these two types of users, and the string comparison;1) Create file]# vim

Linux install LIBNFC, open serial PN532


Hardware preparation:USB to serial port4-Pin DuPont LinePN532 ModuleIC card (such as access card, rice card, etc.)Software Preparation:Ubuntu Physics Machine One setAccess to the Internet1, connect PN532 with USB to serial port, put an IC card close

A Linux command (per day): Linux directory structure

When using Linux, if you go through ls–l/you will find that there are many directories, such as etc, USR, var, bin ... And so on, and in these directories, we go inside and see that there are also a lot of directories or files. The file system looks

Linux diff command

The diff command is a very important tool on Linux to compare the contents of a file, especially to compare two different versions of files to find the changes. Diff prints each line's changes on the command line. The latest version of diff also

The meaning and full name of Linux command shorthand

Su:swith User switch users, switch to root userCat:concatenate SeriesUname:unix Name Name SystemDf:disk free HDDDu:disk Usage HDD UsageChown:change owner Change OwnersChgrp:change Group change user groupsPs:process Status Process stateTar:tape

Compile the progress bar program with the Make command under Linux.

First create a new file, Touch progress_bar.c run the vim progress_bar.c command. The program that writes the progress bar.Write into a progress bar program:#include #include #include voidProgress () {inti

"Linux" Linux Rights Management and special permissions

Linux Rights ManagementRights Management This aspect, very clearly remember the beginning of the internship was carefully studied, do not know why there is no note left mark. In addition to some basic knowledge point has long been forgotten,

A hodgepodge of Linux commands

How do I change the character set? To view the current character set:[Email protected] ~]# echo $LANGZh_cn. UTF-8Modify the character set to English[Email protected] ~]# sed-i ' s#zh_cn#en_us#g '/etc/sysconfig/i18n[Email protected] ~]#

Batch file name modification under Linux (rename)

1.rename Command Batch modified file name, in fact, Linux can use other methods to batch change the file name, but rename is too convenientFor example, change all the tables to cdb1_* to cdb_*.In this directoryOnly need # rename ' cdb1 ' CDB ' *Used

Linux under Glances Server monitoring tool

ObjectiveGlances can provide Unix and Linux performance experts with the ability to monitor and analyze performance data, including: CPU usage Memory usage Kernel statistics and running queue information Disk I/O speed,

See the file size, file size, and other details (Du and DF) using commands under Linux

First, view the file as the disk size generally use the du or DF commandDF Command: used to display the available disk space on a disk partition . The default display unit is KB. You can use this command to get information about how much space the

Common ways to get local IP addresses programmed under Linux

Reproduced in: native IP address is often used when programming Linux networks. This article lists common ways to prepare for a rainy moment.Getting the native IP address is a fairly flexible

Talking about Linux file permissions, that stuff.

Full file rights Show all rights to a file Change the full rights of a file Permissions for files Permissions to change files Change with symbolic notation Change with digital notation

The use of IPC semaphores in Linux

Semaphores are an inter-process communication mechanism used to solve inter-process synchronization and mutex problems, including a variable called semaphore and a waiting queue for the resource waiting on the semaphore, and two atomic operations on

Smoker---------Linux Bash basic features arithmetic operations (5)

Arithmetic operationsArithmetic: The oldest, the most basic, and the first parts of mathematics. It studies the properties of numbers and their operations. Accumulating and collating the arithmetic of numbers and numbers in the application process,

#26 Linux Kernel (kernel) detailed with uname, Lsmod, Modinfo, Depmod, Insmod, Rmmod, modprobe ... Command usage

Linux kernel:Kernel design Genre:Single core design, but fully learn the advantages of micro-kernel system design, for the kernel introduced a modular mechanism, the core height of modularity;After the kernel is modularized, some of the most basic

Linux Set default language

This file/etc/sysconfig/i18n, is to set the system default language place, for my system, now its content is as follows: lang= "en_US" supported= "En_us:en" sysfont= " Latarcyrheb-sun16 "sysfontacm=" iso01 "If you want the default language of the

Mac OSX System, Linux, Windows command line tutorial

Mac OSX System, Linux, Windows command line tutorial Mac OSX System, Linux, Windows command line tutorial I. How to use each system terminal Second, the function of each system command Do something with

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