prtg overview

. /test5/test3 [root@localhost test]# Example 6: Find files by sizeCommand: Find . -size +1000c -print Output: [root@localhost test]# Find.-size +1000c-print . . /test4 . /SCF . /SCF/lib . /SCF/service . /SCF/service/deploy . /SCF/service/deploy/product . /SCF/service/Deploy/info . /scf/doc . /SCF/bin . /log2012. Log . /test5 . /test5/test3 . /test3 [root@localhost test]# D

the pattern field. Represents a hardware device whose I/O is transmitted as a power-block size of 2.4. The character equipment (character device) file is denoted by "C" in the first character of the pattern field (eg,crw--), which represents the hardware device, the data is not organized in blocks, and I/O is sent in a byte stream.5. The first character of the link file in the Pattern field is denoted by "l" (EG,LRW---), and the link is a pointer to the file.6. The first character of a named pi

Unsubscribe Acknowledgment PINGREQ 12 Client to Server PING Request Pingresp 13 Server to Client PING response DISCONNECT 14 Client to Server Client is disconnecting Reserved 15 Forbidden Reserved In the following chapters we will be one to everyone with Wireshark grab bag, and give everyone an analysis of their agreement, please look forward to and attention, thank

OSI Reference Model and TCP/IP Reference ModelAs shown in. OSI's application layer, presentation layer and session layer correspond to the application layer of TCP/IP, the transport layer of OSI corresponds to the transport layer of TCP/IP, the OSI network layer corresponds to TCP/IP network layer, and the network interface layer of OIS data link layer and physical layer corresponding to TCP/IP. Hierarchy of protocols and corresponding network modelsAs shown: Telnet, FTP, SMTP, DNS, SNMP corr

database, Web services, application server and so on.Depending on their situation, the user can decide to start the program at logon or host startup is the startup program.Because the way the program runs can be constantly changing, some users will continue to copy the program from one directory to another directory, the name will be constantly modified, in fact, the user only need to store the application in one place, in the configuration directory with ln-s to establish a Ruan connection can

replacement for the entire GEF Eclipse project, just like we sometimes use Beijing instead of China, just a name. The following three components are described below:(1) draw2dDRAW2D is a lightweight drawing framework. The so-called lightweight is relative to the heavyweight, lightweight refers to these draw2d drawing (figure) is a pure Java object drawn out, and the specific operating system resources are not directly linked. And heavyweight means that every SWT's widgets (parts) are APIs assoc

Web. XML configuration Xmlns:xsi= "Http://www.w3.org/2001/XMLSchema-instance" Xsi:schemalocation= "Http://java.sun.com/xml/ns/javaee Http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd " version= "2.5" > MAVEN configuration: Springmvc-servlet.xml Configuration xmlns:aop= "HTTP://WWW.SPRINGFRAMEWORK.ORG/SCHEMA/AOP" xmlns:context= "Http://www.springframework.org/schema/context" Xmlns:mvc= "Http://www.springframework.org/schema/mvc" xmlns:tx= "Http://www.sprin

algorithm Definition : A description of the solution steps that solve a particular problem.algorithm features : poor, deterministic, feasibility, input, outputdesign requirements for algorithms : correctness, readability, robustness, high efficiency and low storage requirementsalgorithm Measurement Method : Post-mortem method (unscientific), pre-analysis and estimation methodThe asymptotic growth of the function: given two functions f (n) and g (n), if there is an integer n, so that for all n>n,

Objective Blog write more, oneself turn up also laborious, here to carry on the integration. 1 Java-related assorted1 Javamelody Monitoring struts\spring2 javamelody Monitoring SQL3 Javamelody User Guide4 Tomcat compilation Error5 Java deep cloning and shallow cloning6 Jdom additions and deletions change7 Interview Finishing 18 Custom Annotations9 Nested classes and inner classes10 Input/output stream11 How to use the integrated collectionJDK Installation13 using POI to read world conte

, but a bigger problem came:As long as it is an even number it will definitely have a larger approximate number than the odd number. Of course, we need to consider the range of A and B, the number of an even number of adjacent two numbers must not be less than the approximate number of odd number (except 1 and 2), such as: 12 and 13,80 and 81, so this condition is set, the cycle times will fall once again half.Third attempt: So choose to skip the odd number of tests to directly compare the two e

the C language, most statements end with a semicolon.A declaration statement specifies a variable name for a variable and identifies the data type stored in the variable, which is an identifier.An assignment expression statement assigns a value to a variable, which assigns the value to the storage space.The function expression statement is used to invoke the specified named function, and when the calling function finishes executing, the program returns to the statement following the function ca

) Master method calculates the Master method calculation (first case) t (n) = (n^2)Optimization:(A-B) * (c-d) = ac+bd-(Bc+ad) so the xy equation (a*d+b*c) can be replaced with ac+bd+ (B-A) (c-d).That is, the original calculation AC,BD,AD,BC four sub-problems, converted to AC, BD, CD three sub-problems.T (n) =3t (N/2) +θ (n) calculated t (n) =o (n^ (log2^3)) ≈o (n^ (1.59))Classic Question 3: matrix multiplicationInput: Two matrices A, B output: a*bDivide and Conquer:General thinking is divided in

education. The iffy point, in fact, is that it expresses the low-dimensional elements that move along the axis of the higher dimensions to form a high-dimensional entity.The beginning of the animation is actually a page of continuous flipping, because of the phenomenon of visual stop to feel the picture in the continuous movement. That is to say, the graphic graph moves along the time dimension to form an animation, in short, continuous image formation.and the animation plus user Operation cont

system is assigned to the SCHED_RR process time slices, and then polls the process to run the process, putting the elapsed time slice to the end of the queue. Due to the existence of a variety of scheduling methods, Linux process scheduling using "conditional deprivation" scheduling mode. The common process is to use the Sched_other time slice polling method, the real-time process can deprive the ordinary process. If the normal process is running in user space, the normal process immediately st

# to create a set, you need to provide a list as an input set of S = Set ([All-in-one]) print s# repeating elements are automatically filtered in set S = Set ([1,2,3,2,3,2,4]) print s# The add element can be added to the set by adding it, but without effect S.add (4) Print s# removes the element through the Remove (key) method S.remove (4) Print s# determines whether the element is in set S = 5 in Sprint S#set can be seen as a set of unordered and non-repeating elements in mathematical sense, so

Inter-process communication has the following purposes:1, data transmission, a process needs to send its data to another process, the amount of data sent between a byte to a few m;2, sharing data, multiple processes want to manipulate the sharing of data, a process of data modification, other processes should immediately see;3, notify the event, a process needs to send a message to another or a set of processes, notify them that something has happened;4. Share resources and share the same resour

much (44) exception typeJava know how much (45) uncaught ExceptionsHow much Java knows (the) use of try and catchJava know how much (47) use of multiple catch statementsJava knows how much (in) the nesting of try statementsJava know how much (a) Throw: Exception throwsJava know how many () Java throws clausesJava knows how many (or) finallyJava know how much (52) built-in exceptionsJava know how much (53) Use Java to create your own exception subclassesJava know how much (54) assertion detailed

ApplicationContext.Global-sessionThis scope restricts the bean's definition to a global HTTP session. Valid only in the context of Web-aware Spring ApplicationContext.5.2 Life cycleThe initialization and destruction of the Bean corresponds to the init and destroy two behaviors, which can be observed by implementing the Initializingbean/disposablebean interface to initialize the object and destroy the time.Code snippet: Public void throws Exception { System.out.println (this + "--Properties S

red and black trees The rotation of the red and black trees The realization of red and black trees 12 2-3-4 Tree The concept and rules of the 2-3-4 tree 2-34-Tree Implementation The relationship between 2-3-4 tree and red-black tree and the rules of conversion B-Tree B-Tree concepts and characteristics The height of the B-tree Implementation of B-tree Deformation of B-tree 14 Stacks Concept and characteristics of the heap

lookup table.There are also search and find-out points in the search. If the entire lookup process is in memory, it is called inner lookup, and conversely, if you need access to external memory during the lookup process, it is called an outer lookup.Because the primary operation of the lookup operation is a comparison of keywords, the average number of comparisons (also called average lookup lengths) that the keyword needs to perform during the lookup process is often used as a criterion for ev