CentOS View System version
cat/etc/redhat-
1) View the version of the CentOS kernel:
[root@localhost ~]# cat /proc/version Linux version 2.6.18-194.el5 (mockbuild@builder10.centos.org) (gcc version 4.1.2 20080704 (Red Hat 4.1.2-48)) #1 SMP Fri Apr 2 14:58:14 EDT 2010
2) Display the system name, the node name, the operating system's release number, the operating system version, the machine ID
In Linux, you can view the number of physical CPUs, cores, logical CPUs, and linux. In Linux, when you view the number of physical CPUs, cores, and logical CPUs, we recommend that you enable the number of worker processes to 1 to 4 times the number of CPU cores. So I learned how to view the
The number of decimal places in a repeating prime number must be smaller than that in the prime number itself.
Generally, decimal places with the reciprocal of prime numbers are complex. Because the reciprocal of prime numbers is also a fraction, it must be a round-robin decimal (except for 2 and 5 ), but what is the maximum
The JS Code randomly generates the name, mobile phone number, ID card number, bank card number, and js bank card number.
During development and testing, you often need to enter the name, mobile phone number, ID card number, and ba
Regular expression set for validating numbers
Verification Number: ^[0-9]*$
To verify N-bit numbers: ^\d{n}$
Verify that at least n digits: ^\d{n,}$
Verify the number of m-n bits: ^\d{m,n}$
Verify numbers starting with 0 and non 0: ^ (0|[ 1-9][0-9]*) $
Verify that there is a positive real number with two decimal places: ^[0-9]+ (. [ 0-9]{2})? $
Question: In the array, subtract the number on the right of the number to get a number pair. Calculate the maximum value of the difference between all number pairs. For example, in the array {2, 4, 1, 16, 7, 5, 11, 9}, the maximum value of the number pair is 11, which is the
How to solve the micro-letter public number anomaly:
December 16 News, today morning, some netizens reflect, micro-letter public number reading abnormal, point praise and reading number and the actual situation is several times worse.
Take the public number "serious gossip" for example, usually the account headline r
GCDTime Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission (s): 605 Accepted Submission (s): 268
Problem DescriptionThe greatest common divisor GCD (a, B) of two positive integers a and B, sometimes written (a, B), is the largest divisor common to a and B, For example, (1, 2) = 1, (12, 18) = 6.(A, B) can be easily found by the Euclidean algorithm. Now Carp is considering a little more difficult problem:Given integers N and M, how many integer X satisfies
Change the positive number to the corresponding negative number, and change the negative number to the corresponding positive number # include Copyright NOTICE: This article for Bo Master original article, without Bo Master permission not reproduced."C" Changes the positive number
In software encryption protection technology, a common protection method is license authorization based on hardware fingerprint. This article will introduce the specific hardware fingerprint acquisition technology in detail and provide a demo source code program.
Hardware fingerprint encryption means that after a user obtains and installs the software for free, the software obtains some hardware information (such as the hard disk serial number and BO
#include #include #pragma mark counts the number of characters in each letter entered from the terminal. Use the # sign as the input end flagint main (){int num[26] = {0}, I; char c;while ((c = GetChar ()) = = ' # ') {if (Isupper (c)) {num[c-65]++;}}for (int i = 0; iif (Num[i]) {printf ("%c:%d\n", i+65, Num[i]);}}return 0;}#pragma mark counts the number of words in a line of charactersint main (){Char s[81]
Delphi Get HDD serial number function getidenum:string; Type Tsrbiocontrol = packed record headerlength:ulong; SIGNATURE:ARRAY[0..7] of Char; Timeout:ulong; Controlcode:ulong; Returncode:ulong; Length:ulong; End Srb_io_control = Tsrbiocontrol; Psrbiocontrol = ^tsrbiocontrol; Tideregs = packed record bfeaturesreg:byte; Bsectorcountreg:byte; Bsectornumberreg:byte; Bcyllowreg:byte; Bcylhighreg:byte;
This article is entitled Baidu Quality Department interview questions
2n number, half odd number, half even number, design a program to make the number on the odd digit is odd, the number on the even bit is even, and calculate the space complexity and time complexity of the
Topic:Give 1 positive integers, and find the smallest number in an integer larger than this number in the digit of the same number. For example: 12352874 of the result is 12354278Analysis:The objective of this topic is to find and sort arrays.Of course, the premise is that you have to understand what the idea of this topic looks like. Convert a positive integer t
Statistics on the number of file lines, number of words, and number of characters in Ruby, and number of ruby lines
In Ruby, we define a wc method to count the number of lines, words, and characters in the file. The ruby code program is as follows:Copy codeThe Code is as fo
public class Computesourceline {public static void main (string[] args) throws FileNotFoundException {//TODO auto-generate D method stub//defines the relevant variable int totalline = 0;int Emptyline = 0;int Commentline = 0;int CodeLine = 0;//We all focus on the scanner class (network search) and The use of the string class (textbook P75 and the Network)//path to the file string strfilename;//using the command line, if there is a command line argument, the file name is obtained from the outside
Http://www.cnblogs.com/wuhuisheng/archive/2011/03/23/1992652.html
The main code for phone number verification is as follows:
Public bool istelephone (string str_telephone)
{
Return System. Text. regularexpressions. RegEx. ismatch (str_telephone, @ "^ (\ D {3, 4 }-)? \ D {6, 8} $ ");
}
The main code used to verify the mobile phone number is as follows:
Public bool ishandset (string str_handset)
{
Return Sys
1. We open the "Sogou number" on the phone and enter the Dial-up interface of the software, we click on the "arrows" shown in the picture and then open the entry
2. After opening the tag interface into the phone book, click the "arrow" details below
3. After this we can have a lot of types, if not, can also manually mark, or directly pull black
All right, here we are. About Sogou number
Method One:
We can use the icloud on the computer to delete, we open the ps://www.icloud.com/in the browser ">https://www.icloud.com/after we click on the icloud enter will see no spam number, But there are still some in the Apple phone, we just find the icloud in the iphone "Setup" to close the Address Book, choose to remove the Address book on the iphone, open the address again.
Method Two:
1. First to allow access to the Address Book,
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