linux command arguments

"Copyright Notice: respect for the original, reproduced please retain the source: blog.csdn.net/shallnet, the article only for learning Exchange, do not use for commercial purposes"In a high-level language, a program often takes one or more

Sometimes we need to write some scripts to handle some tasks, it is often necessary to provide some command line parameters, according to different parameters for different processing, in Python, command line parameters and C language very similar

(i) Main function callThe main function acts as the entry function when the program is run, how is it called? The first thing to be clear is that the main function is also a function that can only be executed if it is called. In fact, when executing

Reprint: http://blog.csdn.net/hcx25909/article/details/7388750Every day you are using a lot of command-line programs, is not it feel that the command line parameters used more convenient, they are using getopt to achieve.Using getopt to write

Basic knowledge of computer playing:CPU (operator, Controller), memory, I/O (input device, output device)程序运行模式： 用户空间：user space,us （可执行普通指令） 内核空间：system space （可执行特权指令）POS：Postable Operating System 可移植操作系统 POSIX 可移植操作系统规范运行程序格式：Windows：EXE，

1. Source of demandSometimes we need to write some scripts to deal with some tasks, may enter different commands according to different conditions, to accomplish different tasks. Can you do the same thing as the Linux operating system, looking a

mysql command-line arguments ---These parameters differ from those parameters after mysqldump : 2 Types of parameters have different meaningsOne, MySQL command line parameters usage:mysql [OPTIONS] [Database]//Command mode-?,--Help//Display Help

Determine if the contents of a file are not empty, use the statement: If test-z ' cat filename ' When the filename is empty or there is only one line of strings without spaces, all normal, on the contrary, will report: Too many arguments, or even:

Before explaining these differences, let's look at the background knowledge of Linux, which requires you to read it carefully before you get a deeper understanding of the differences and a better understanding of Linux.About System V and BSD styles

[Excerpt from the network]Kill-9-1 is the implementation of the kill command to exit the systemLinux main shell commands [previous]The shell is the interface between the user and the Linux operating system. There are multiple shells in Linux, with