Linux

Originally always use Restclient-ui tool, is the graphical interface, the operation is very troublesome. Want to use Shell script batch call to execute use case, so find Restclient tool has no command line, the Internet search, sure enough. The

Install Gedit sudo apt-get update sudo apt-get install gedit-gmate sudo apt-get install Gedit-plugins sudo apt-get remove gedit sudo apt-get install gedit Change gedit default settings: 1. Open Preferences from Gedit menu and select Editor

1. grep is a powerful text search tool that uses regular expressions to match. Format is: Gerp option ' script ' file 2, Regular expression: (1) of which characters: +,. , (), |,{}. In datum mode: The meaning of ordinary characters, the need for

CPU is divided into nodes, memory is clustered, each CPU corresponds to a local physical memory, that is, a cpu-node corresponding to a memory cluster bank, that is, each memory cluster is considered a node. The physical memory of the system is

The limits.conf file is actually a pam_limits.so configuration file in Linux PAM (plug-in authentication module, pluggable authentication Modules), and only pins for a single session. The limits.conf format is as follows: username| @groupname  type

twos of Linu perf use experience Perf is a very powerful tool that has been heard before but has never been used. Record now to find out afterwards. compiling In addition to installing from the Package Manager, you can also compile directly from

Linux Write system service method 2.1 First write demo program: HELLO.C #include main () { FILE *fp; Char a[] = "Hello world!"; Fp=fopen ("Hhh.txt", "A +"); Fputs (A,FP); return 0; } 2.2 Compiling HELLO.

When the logical address is converted to a linear address, as we said, using the first 13 bits of the value in the segment register as an index to index the global descriptor chart, in Linux, it is funny that it intentionally uses the numerical to

Many of our C programs are presented in the form of DLLs in Windows, and Linux is shown in so form. Windows generally does not have DLL files that cannot be executed because the compiler version of the DLL file is different. But under Linux, the C

Linux has a stringify header file, the main contents of which are as follows: #ifndef __linux_stringify_h #define __LINUX_STRINGIFY_H/ * Indirect stringification. Doing two levels allows the parameter to be a * macro itself. For example,

Makefile Format goal: to rely on [Tab] command Compiling multiple executable files CC = gcc all:fprintf __file fprintf:fprintf.c $ (cc) Fprintf.c-o fprintf __file:__file.c $ (cc) __ File.c-o __file . Phony clean:

Turn 1. Http://blog.sina.com.cn/s/blog_40e1ba640102wm26.html 2.http://www.cnblogs.com/joeyupdo/archive/2013/03/03/2941737.htmlThe following is an introduction to copy Link 2(1) Encoding:vim internal use of the character encoding method, including

Author: HH Time: 2017-09-24 location: Hangzhou Mail: chenhfxy@163.com 1. Prepare the custom jar package as follows: The 1.1 exported jar packages are shown in the following illustration 2. Set the jar package as a Linux service, which is not

1.helloworld.c #include //information related to module #include #include //init-related functions static int __init hellokernel_init (void) { printk (kern_info "Hello kernel!\n"); return 0; } static void __exit

Previously used in the Friendlyarm Development Board CD with, decompression and then set the environment variable can be used normally. And then look at Vedon's "Embedded Linux application Development complete manual" to introduce the cross tool

This is my own in the installation and configuration of Nginx to do some of the records, may be written in some places not detailed. Nginx relies on the following software libraries to ensure that these repositories are installed prior to

The command MV for renaming a file or folder under Linux can be renamed and moved to a file or folder. Example: Rename directory A to B MV A B Example: Move the/a directory down to/b, and rename to C mv/a/b/c In fact, in the text mode to rename the

First, let's take a look at the parent process and the subprocess, the previous sections on how to create a subprocess, like this, pid_t id = fork (); So we create a subprocess, but what is the return value of the fork () function? Remember here:

what is a process. Process: A process is a computer program on a data set of a running activity, is the system for resource allocation and scheduling of the basic unit, is the basis of operating system structure.To put it simply: a process is a

In Linux, Cron is used to schedule repetitive tasks, and the Linux at command is used to schedule one-time tasks within a specified time. To use the Linux at command, you must have the at RPM package installed, and the ATD service must be