if greater than

Shell Programming:Compilers, interpretersProgramming languages: Machine language, assembly language, advanced languagesStatic language: Compiled languageStrongly typed (variable)Convert into executable format in advanceC, C + +, JAVA, C #Dynamic

Disk partitioning is actually changing the contents of the Dpt-Disk partition table (64Bytes, 16 bytes per partition table). linux fdisk  Interactive partition test (note that the primary partition must not exceed 4-disk requirements, the extended

CD commandThe CD is used to change the user's directory after the same as nothing will go directly to the currentThe user's root directory can only be followed by a directory name, not a file namecd– indicates the last directory in which it was

The Vmstat command is the most common Linux/unix monitoring tool that can show the status of a server at a given time interval, including server CPU utilization, memory usage, virtual memory exchange, IO Read and write situations. This command is I

I. CPU performance EVALUATION1.vmstat [-v] [-N] [Depay [Count]]-V: Print out version information, optional parameters-N: Header information is displayed only once for cyclic outputDelay: The time interval between outputs of two timesCount: The

Because the author has always been using CentOS, this installation is also based on the CentOS installation . Insert the CD into the CD drive and set the BIOS drive to boot . Enter the CD's Welcome screen . There are two options, you can press enter

Linux for viewing process commands are also very powerful, commonly used such as: PS TopBut there is less uniformity in disk performance monitoring.Here are some of the disk monitoring commands, here just to play a role, detailed use of parameters

The Vmstat command is the most common Linux/unix monitoring tool that can show the status of a server at a given time interval, including server CPU utilization, memory usage, virtual memory exchange, IO Read and write situations. This command is I

Recently discovered a very nice Linux system, so that as coder me immediately want to throw windows out of several streets, probably because me to mate too much love for the sake of it!The name of this system is called Korora, we can search directly

LINUX Common Commands (i)1.Find search filecommand to perform a real-time search on the local file system to find files that match the command parameters. Users who use the Find command must have read and execute permissions to the directory in

== : Two strings are equal! =: Two characters not equal> : Whether a string is greater than another string : Whether a string is less than another string- N String : Tests whether the specified string is empty- s string : Tests whether the

Process Management Programs: Usually binary programs in the storage medium (such as CD-ROM, hard disk, floppy disk, tape, etc.), in the form of physical files exist;Process: The program is running, after the program is triggered, the

Commands for 1.W[Email protected] ~]# W22:59:41 up 15:46, 1 user, load average:0.00, 0.01, 0.05USER TTY from [email protected] IDLE jcpu PCPURoot pts/0 10.0.0.1 22:43 5.00s 0.05s 0.02s W[Email protected] ~]#2.uptime command[Email protected] ~]#

3.1 Overview What problems does the garbage collector solve? Which memory needs to be recycled When is it recycled? How to Recycle Reference counting algorithm:When there is a reference to a place, +1, the reference fails,-1.

The concept of performance testing is what, the basic purpose is what, I think everyone is basically clear, not to be detailed, in short, performance testing is just one way in the test process, to help our function better run, if the functional

The TOPK problem, which is finding the largest number of K, is very common, such as finding the hottest 10 keywords from 10 million search records.Method One:First, then the number of the first k is truncated.Time complexity: O (N*logn) +o (k) =o (N*

First Lecture Array Initialization & Operation1. Array definitionConcept: An array is a collection of data of the same type, in fact an array is a container. The elements in the array are numbered starting with 0, which makes it easier to manipulate

Introduction to a regular expressionA regular expression is a special sequence of characters that can help you easily check whether a string matches a pattern.Python has added the RE module since version 1.5, which provides a Perl-style regular

First, the purpose of the experiment:Compare The execution efficiency of at least 4 sorting algorithms. The algorithms that have been learned: bubble sorting, select sort, insert sort,shell Sort, merge sort, quick sort, etc. Second, the

Ideas:Method 1:md5 Verify the contents of the file.Method 2: Get the last modified time for the file.Here are the methods 1Download the MD5 class library1, the head reference:" Lib/md5.cpp "2, write yourself a function,param input file path, return