COS 318: Operating Systems Overview Kai Li Computer Science Department
... Issues Inputs from keyboard, mouse, touch screen, … Display output from applications and systems Labor of division ...
... Issues Inputs from keyboard, mouse, touch screen, … Display output from applications and systems Labor of division ...
Booting and Shutting Down UNIX Flavored Operating Systems
... UNIX systems must be gracefully powered down. Failure to properly shut down can cause damage to the system. There are various was to shut down a UNIX system; generally a command to shut down the system is issued from the command line. Here are a few commands: – shutdown: Broadcasts a message ...
... UNIX systems must be gracefully powered down. Failure to properly shut down can cause damage to the system. There are various was to shut down a UNIX system; generally a command to shut down the system is issued from the command line. Here are a few commands: – shutdown: Broadcasts a message ...
Design of MS-DOS
... • The remainder of DOS is made up of its many utility programs. These programs can be divided into two groups : - Internal Commands - External Commands • Internals command utilities are part of (and are implemented in) the command.com file. EG : DIR, MD, CD etc…. • External DOS utilities are separat ...
... • The remainder of DOS is made up of its many utility programs. These programs can be divided into two groups : - Internal Commands - External Commands • Internals command utilities are part of (and are implemented in) the command.com file. EG : DIR, MD, CD etc…. • External DOS utilities are separat ...
Slide 1
... interface graphical user (GUI)data and instructions and how information displays on the screen Allows you to use type keywords menus andorvisual press special keys images to issue on the keyboard to enter commands data and instructions ...
... interface graphical user (GUI)data and instructions and how information displays on the screen Allows you to use type keywords menus andorvisual press special keys images to issue on the keyboard to enter commands data and instructions ...
COS 318: Operating Systems Overview Kai Li and Andy Bavier
... Allocate/deallocate by process creation (fork) and termination Names are relative to stack pointer and entirely local Linker and loader say the starting address Allocate/deallocate by library calls such as malloc() and free() Application program use the library calls to manage ...
... Allocate/deallocate by process creation (fork) and termination Names are relative to stack pointer and entirely local Linker and loader say the starting address Allocate/deallocate by library calls such as malloc() and free() Application program use the library calls to manage ...
Operating system flexibility - La page d`accueil du P:L:O:U:G
... Step 2: Confirm the old and new OS media, and create a boot floppy disk After backing up all of the important files and before making the changes, make sure that the sources of the existing operating system and the new OS to be installed are on hand and complete. This includes updates, patches, util ...
... Step 2: Confirm the old and new OS media, and create a boot floppy disk After backing up all of the important files and before making the changes, make sure that the sources of the existing operating system and the new OS to be installed are on hand and complete. This includes updates, patches, util ...
Basic Functions of the operating system
... – Can access more than 128GB RAM – Data path is bigger, faster – Need 64-bit program to take advantage of it ...
... – Can access more than 128GB RAM – Data path is bigger, faster – Need 64-bit program to take advantage of it ...
Identify Steps in the Startup Process
... elements that hold the information that is required to load Windows or run other boot applications. Physically, a BCD store is a binary file in the registry hive format. ...
... elements that hold the information that is required to load Windows or run other boot applications. Physically, a BCD store is a binary file in the registry hive format. ...
Operating System
... merging adjacent disk read requests into a single request. – default: tells LILO which image to boot from by default, such as after the timeout period. This relates to a label of one of the images in the lilo.conf file. If not specified LILO will boot the first image in the file. – image: specifies ...
... merging adjacent disk read requests into a single request. – default: tells LILO which image to boot from by default, such as after the timeout period. This relates to a label of one of the images in the lilo.conf file. If not specified LILO will boot the first image in the file. – image: specifies ...
Linux Pres1 - Parent Directory
... The recommended place to install boot Loader, unless the MBR already starts another operating system loader, such as System Commander or OS/2's Boot Manager. The MBR is a special area on your hard drive that is automatically loaded by your computer's BIOS, and is the earliest point at which Boot Loa ...
... The recommended place to install boot Loader, unless the MBR already starts another operating system loader, such as System Commander or OS/2's Boot Manager. The MBR is a special area on your hard drive that is automatically loaded by your computer's BIOS, and is the earliest point at which Boot Loa ...
OS Services System calls and their types
... the following directories. Run level 0 – /etc/rc.d/rc0.d/ Run level 1 – /etc/rc.d/rc1.d/ Run level 2 – /etc/rc.d/rc2.d/ Run level 3 – /etc/rc.d/rc3.d/ Run level 4 – /etc/rc.d/rc4.d/ Run level 5 – /etc/rc.d/rc5.d/ Run level 6 – /etc/rc.d/rc6.d/ Programs starts with S are used during startup. S for st ...
... the following directories. Run level 0 – /etc/rc.d/rc0.d/ Run level 1 – /etc/rc.d/rc1.d/ Run level 2 – /etc/rc.d/rc2.d/ Run level 3 – /etc/rc.d/rc3.d/ Run level 4 – /etc/rc.d/rc4.d/ Run level 5 – /etc/rc.d/rc5.d/ Run level 6 – /etc/rc.d/rc6.d/ Programs starts with S are used during startup. S for st ...
Booting a PC
... hardware to map virtual address 0xf0100000 -- the link address at which the kernel code expects to run -- to physical address 0x00100000 -- where the boot loader actually loaded the kernel. The kernel's virtual address is high enough to leave plenty of address space for user processes, it will be lo ...
... hardware to map virtual address 0xf0100000 -- the link address at which the kernel code expects to run -- to physical address 0x00100000 -- where the boot loader actually loaded the kernel. The kernel's virtual address is high enough to leave plenty of address space for user processes, it will be lo ...
DOS - InfoShare.tk
... MS-DOS is a disk-based, single-user, single-task operating system. These qualities make it one of the easiest disk operating systems to understand. ...
... MS-DOS is a disk-based, single-user, single-task operating system. These qualities make it one of the easiest disk operating systems to understand. ...
MS Word file - Maricopa Community Colleges
... 6. ____________________________ define the rules of communication between two computers and include TCP/IP and NWLINK. 7. The DOS command to display all the TCP/IP properties is ___________________________8. In the user mode, the __________________ process is a connection that allows data to flow be ...
... 6. ____________________________ define the rules of communication between two computers and include TCP/IP and NWLINK. 7. The DOS command to display all the TCP/IP properties is ___________________________8. In the user mode, the __________________ process is a connection that allows data to flow be ...
operating system
... The OS maintains additional information about running programs (location in memory, stack pointer, program counter). When a program is run, the operating system converts it into a process. It is the process, rather than the simple program, that the processor executes. ...
... The OS maintains additional information about running programs (location in memory, stack pointer, program counter). When a program is run, the operating system converts it into a process. It is the process, rather than the simple program, that the processor executes. ...
Run Standard Diagnostic Tests
... corrupted the file system or Master Boot Record (MBR). 3. A common mistake is a floppy disk being left in the drive. 4. Cables not connected to hard disk drive properly. ...
... corrupted the file system or Master Boot Record (MBR). 3. A common mistake is a floppy disk being left in the drive. 4. Cables not connected to hard disk drive properly. ...
Operating- System Structures
... List five services provided by an operating system. Explain how each provides convenience to the users. Explain also in which cases it would be impossible for user-level programs to provide these services. Answer: a. Program execution. The operating system loads the contents (or sections) of a file ...
... List five services provided by an operating system. Explain how each provides convenience to the users. Explain also in which cases it would be impossible for user-level programs to provide these services. Answer: a. Program execution. The operating system loads the contents (or sections) of a file ...
fund8que.doc
... __13. A device driver is a program that tells the operating system how to communicate with a device. __14. Windows 95 did not require DOS to run. __15. UNIX commands may be considered somewhat difficult to remember and use. ...
... __13. A device driver is a program that tells the operating system how to communicate with a device. __14. Windows 95 did not require DOS to run. __15. UNIX commands may be considered somewhat difficult to remember and use. ...
Operating Systems - Villanova Computer Science
... • The pieces are stored on the hard disk as if it were additional RAM memory needed by the program. • The pieces are retrieved into RAM as needed. • Disadvantage: This slows the system down, because retrieval of information from the disk is time consuming. ...
... • The pieces are stored on the hard disk as if it were additional RAM memory needed by the program. • The pieces are retrieved into RAM as needed. • Disadvantage: This slows the system down, because retrieval of information from the disk is time consuming. ...
Windows booting procedure
... on computer and warm booting is the processes happening when we reset the computer. During the booting process the computer loads the operating system to its memory and prepares it for use. ...
... on computer and warm booting is the processes happening when we reset the computer. During the booting process the computer loads the operating system to its memory and prepares it for use. ...
Why Study OS?
... System calls are implemented in the kernel Application “traps” to kernel to invoke a system call When finishing the service, a system returns to the user code ...
... System calls are implemented in the kernel Application “traps” to kernel to invoke a system call When finishing the service, a system returns to the user code ...
Operating- System Structures
... List five services provided by an operating system, and explain how each creates convenience for users. In which cases would it be impossible for user-level programs to provide these services? Explain your answer. Answer: The five services are: a. ...
... List five services provided by an operating system, and explain how each creates convenience for users. In which cases would it be impossible for user-level programs to provide these services? Explain your answer. Answer: The five services are: a. ...
Booting
In computing, booting (or booting up) is the initialization of a computerized system. The system can be a computer or a computer appliance. The booting process can be ""hard"", after electrical power to the CPU is switched from off to on (in order to diagnose particular hardware errors), or ""soft"", when those power-on self-tests (POST) can be avoided. Soft booting can be initiated by hardware such as a button press, or by software command. Booting is complete when the normal, operative, runtime environment is attained.A boot loader is a computer program that loads an operating system or some other system software for the computer after completion of the power-on self-tests; it is the loader for the operating system itself, which has its own loader for loading ordinary user programs and libraries. Within the hard reboot process, it runs after completion of the self-tests, then loads and runs the software. A boot loader is loaded into main memory from persistent memory, such as a hard disk drive or, in some older computers, from a medium such as punched cards, punched tape, or magnetic tape. The boot loader then loads and executes the processes that finalize the boot. Like POST processes, the boot loader code comes from a ""hard-wired"" and persistent location; if that location is too limited for some reason, that primary boot loader calls a second-stage boot loader or a secondary program loader.On modern general purpose computers, the boot up process can take tens of seconds, and typically involves performing a power-on self-test, locating and initializing peripheral devices, and then finding, loading and starting an operating system. The process of hibernating or sleeping does not involve booting. Minimally, some embedded systems do not require a noticeable boot sequence to begin functioning and when turned on may simply run operational programs that are stored in ROM. All computing systems are state machines, and a reboot may be the only method to return to a designated zero-state from an unintended, locked state.Boot is short for bootstrap or bootstrap load and derives from the phrase to pull oneself up by one's bootstraps. The usage calls attention to the requirement that, if most software is loaded onto a computer by other software already running on the computer, some mechanism must exist to load the initial software onto the computer. Early computers used a variety of ad-hoc methods to get a small program into memory to solve this problem. The invention of read-only memory (ROM) of various types solved this paradox by allowing computers to be shipped with a start up program that could not be erased. Growth in the capacity of ROM has allowed ever more elaborate start up procedures to be implemented.