man egrep

Man command, use of man command Man -- get help information ManUal Command path:/usr/bin/man Example 1: View Command help information # Man ls Display the ls command help information, mainly to view the NAME (command Introduction) and parameters. On the Help Page, fl

After installing the CENGOS7, follow the bird Brother's book, go to a place, in the shell input man-f man Use the keyword to find more data, if not, first to create a Whatis database under root privileges.Well, I entered Man-f man, and the result is nothing appropriateSo login root input makewhatis, result Command not

A Hungry man type: public class singleton{ private static Singleton Singleton = new Singleton (); Private Singleton () {} public static Singleton getinstance () {return singletion;} } Lazy Type: public class singleton{ private static Singleton Singleton = null; public static synchronized synchronized getinstance () { if (singleton==null) { Singleton = new Singleton (); } return singleton; } } Comparison: The A Hungry

that his most beloved sons were arguing about his hospitalization expenses tonight? Sons quarrel for less money, a few daughter-in-law also crazy in the village of several mountains sitting scold this long-dead old man, said all die still don't forget to take some money to go, stepmother is this war instigators, she side to the father of dementia brainwashed, On the side of the discord, at home, I heard the big talk, then wanted to mention the killin

Man-Machine guessing (this is a recent summary) and man-machine guessing recently Man-Machine guessing is a piece of original code. I just learned do-while, But I have limited knowledge, but I feel that this piece of code is a small peak of mine. Let's see it, it is excellent for new users to learn things, and they want to give some suggestions to the old birds.

A letter from a black man to a white man. (Post) Dear white, something you got to knowDear white man, there are a few things you must know.When I was born, I was black.When I was born, I was black.When I grow up, I am black.I grow up, I am blackWhen I'm under the sun, I'm black.I am in the sun, I am blackWhen I'm cold, I'm black.When I am cold, I am

Before seeing the Island of Elba, I was never a man, but the Island of Elba was never a man.Description You should have heard of replies? To put it simply, reading back is the same as reading back. In Chinese history, there have also been some poems, four of which are famous: Spring Chunqing, spring, and moon. Moon and night, spring and spring, and spring. Summer Xianglian bishui, fengliang, and long summer. In the long summer, the wind

 #include #include struct node{Char s[15];int hour1;int fen1;int mia1;int hour2;int fen2;int mia2;}C[100];int cmp (const void *a,const void *b)//QSOTRTSortThree-level structure sorting{struct node *c= (node *) A;struct node *d= (node *) b;if (C-GT;HOUR1!=D-GT;HOUR1) return c->hour1-d->hour1;else if (C-GT;FEN1!=D-GT;FEN1)Return c->fen1-d->fen1;else return c->mia1-d->mia1;}int cop (const void *a,const void *b)//qsortSortThree-level structure sorting{struct node *c= (node *) A;struct node *d= (no

each person's check-in time is before the checkout time.And no more people sign in or sign out at the same time.Sample Input31me3021112225321 00:00:00 23:59:592ee301218 08:05:35 20:56:35ma301134 12:35:45 21:40:423cs301111 15:30:28 17:00:10sc3021234 08:00:00 11:25:25cs301133 21:45:00 21:58:40Sample OutputME3021112225321 me3021112225321ee301218 ma301134sc3021234 CS301133SOURCE Zhejiang University Computer Postgraduate exam on the machine-2005Record the first one, and then compare them to find the

Door opener and closing manTime limit:2000/1000 MS (java/others) Memory limit:65536/32768 K (java/others)#include 　　Total submission (s): 11667 Accepted Submission (s): 5934Problem description The first person to the computer room every day to open the door, the last one to leave the door closed. A mess of the existing roomTo and from the record, please find out the person who opened and closed the door according to the records.The first line of input test inputs gives the total number of days o

door opener and closing manTime limit:2000/1000 MS (java/others) Memory limit:65536/32768 K (java/others) total submission (s): 11012 Accepted Submission (s): 5612Problem DescriptionEvery day the first person to the computer room to open the door, the last one to leave the door closed. A mess of the existing roomTo and from the record, please find out the person who opened and closed the door according to the records.InputThe first line of the test input gives the total number of days of the rec

If you are a fat man and are trying to lose weight, your friends want to invite you to a big meal. What is your intuition about his mentality? A. It's just that it doesn't make sense to ask you to have dinner by the way.B. It's hard for you to go hungry and lose weight.C. Test your willpower to lose weight.D. make you happy. I hope you can easily lose weight. A. You will try your best to enrich your major. in three years, you will be able to eat a

It's a good thing to have a Chinese help handbook just to learn Linux. Linux comes with help although there are multiple languages, there is currently no Chinese help manual for various distributions of Linux. It makes sense to build a Chinese manual that suits you. The configuration process is actually relatively simple, just need to know the Chinese package, and then put in the man can search for the directory, basic can be. Here are a few steps to

Recently began to learn Linux C programming, need to use a lot of library functions and C standard library functions, found that the original Man command can also be used to query function prototypes.For example, enter man Lseek to get the prototype of the function Lseek and the owning header file.Some function names are both Linux commands and system calls, such as mkdir, which can be entered by the

ObjectiveDaily use of common commands and non-common commands, forgetting usage or parameters, will Bing, and then loop. There has been no real system in-depth to understand the use of commands, and I decided to break it. Before I saw someone, learning a Linux command every day, I do not have so much time, I am afraid to learn a Linux command a week I can not do, think I still n days to learn a Linux command bar, from now on to count.UseDisplay command Help documentation and usageUsageman [optio

This original article belongs to "Linux greenhouse" blog, the blog address is http://roclinux.cn. The author of the article is rocrocket.In order to prevent the vicious reproduction of some websites, special in each article before adding this information, but also hope that readers understand. ===[Start of body]When you first touch Linux, you will use man to look up some commands for help. But it's all just a simple format that uses the "

This paper is the second article of design pattern learning notes, which is mainly about the single case mode. This includes lazy, a hungry man, registration, and lazy-type improvements, as well as an instance of reading propertoes configuration files. It is expected to be divided into three sections. This is the first section, first analysis of the simplest of the lazy and a hungry man-style. The single c

What do you expect from a man who pays attention to entertainment all day? What achievements do you expect from a man playing games all day and a man playing mahjong all over the world? Whether you like it or not, such a thing is worth reading. I. self-confidence and demeanorWhen a man is in his twenties, he will begin

1.man page　　　 Code Content Description NAME Short instructions, data description Synopsis Brief introduction to the syntax of the instruction release DESCRIPTION A more complete description, this part is best to take a closer look OPTIONS For the Synopsis section, there is an enumeration of all available option descriptions COMMANDS When t

I. self-confidence and demeanor When a man is in his twenties, he will begin to learn how to manage himself. It is embodied in his own thoughts and cultivation. Confidence is the most important quality for a man. A confident man is like a seagull fighting in the storm. What seagull has to say is "Let the storm come more violently", just because it is fearless. A