computer basics for dummies

that facilitates the handling of programs and hardware, and some common programs that are used by all programsLibrary calls: Encapsulating system callsLiberal callKernel callSystem call(kernel receives requests from other programs)malloc (), free () two system calls requesting memory and freeing memoryPos:portable Operating System POSIXa rule ----- Portable Operating system specification, programs written on different platforms can be compatible with each othercompiling compilation links Execut

(Beginner)Minimal (production environment)8. Installation Attention DetailsALT+CTRL+F2 can be switched to the temporary command line during installationDrawing in Windows: Running MPsNetwork card settings can be automatically obtained or manually set (IP, subnet mask, gateway, DNS)Time setting interface removes "System clock uses UTC current time as GMT"Using a custom partitioning strategyInstalling the KDE environment in desktops9. Install VMware Tools (after downloading VMware Tools, the Cent

1. The computer hardware is based on the operating system, and then the application software. 2. The Python language processes the operating system and then completes hardware usage through the operating system. 3. Memory: data cannot be stored permanently, but the speed is fast. Hard Disk: permanent data storage, but slow 4. The operating system and application software are stored in the hard disk, and some programs of the operating system direct

Computer hardware can actually be more easily divided into CPU + memory +io devices. The three of them are through a bus to exchange data, and you know in the three CPU speed of the fastest, memory second, IO device third, to make the three coordination of communication requires a certain control. 2. our CPU has its own local bus, the same memory, the local bus through the motherboard of the South Bridge chip link together to communicate. North Brid

| | _inf = Max |x_i|$General P norm:| | x| | _p = (\sum_{i=1}^n x_i^p) ^1/p$Matrix norm:| | a| | _f = \sqrt{\sum_{i=1}^m \sum_{j = 1}^n a_ij^2 = \sqrt{tr (a^ta)}$The rank of the matrix: $det (AB) = det (BA) $ $det (a^-1) = \frac{1}{\det (A)}$ $det (a^t) = det (A) $ $det (A) = 0$ when and only if $a$ is singular Trace of the Matrix: the and of the diagonal elementsSpecial matrices: Identity matrix: The diagonal element is 0 and the other element is 1 Diagona

1. Start Terminal 1 point Menu "application-attachment-terminal" command, open a terminal window; 2 out of a terminal window, the title bar is their own username and computer name, a cursor in the window flashing a flash, indicating that you can enter the command; ; The above ~ represents its own home folder, $ represents the normal command prompt, and if it is a #, it is the administrator prompt; 2. Common commands 1 ls command, a

computer is loaded into memory and then handed to the CPU for operation.4. Input device: Data input into the computer (mouse, keyboard, scanner, microphone, camera are input devices. ）5. Output device: Outputs the data (display, printer)6. Communication equipment: Network card (hardware necessary for Internet)Two. Software (consisting of programs and documents). For example, a photo, a resume, a piece of a

Computer Basics: Binary, octal, decimal, hex 2006-11-29 20:23 one or 10 binary number The decimal number is the most widely used counting system in daily life. The symbols that make up the decimal number have a total of 10 symbols such as 0,1,2,3,4,5,6,7,8,9, and we call these symbols digital.In decimal, each digit has a total of 10 0~9, so the base of the count is 10. More than 9 must be repres

details are not the same, you can run different systemsApi:application Programming Interface Application Programming Interface (programmer)CPU Architecture Type:X86X64Armm68000,m68k MotorolaPower IBMPowerPC Apple Motorola IBM co-developmentUltraSPARC SUNAlpha HPItanium CompaqWindowsLinux:Linus→linuxGnu/linuxUnix:System: (Bell Lab)AIX (IBM)Solaris (SUN)HP-UX (Hewlett-Packard)BSD: (BSRG) Berkeley System distributionNetBSDOpenbsdFreebsdMit:richard StallmanGnu:gnu is not Unix:Gpl:general Public Lic

Assume is s a string of lower case characters.Write A program This prints the longest substring of in s which the letters occur in alphabetical order. For example, if s = ‘azcbobobegghakl‘ , then your program should printLongest substring in alphabetical order Is:begghIn the case of ties, print the first substring. For example, if s = ‘abcbcd‘ , then your program should printLongest substring in alphabetical order IS:ABC# Paste Your code into this boxCount = 1result = S[0]While S:Newcount = 1New