CS211 Slides
... – More complex tasks can be accomplished by combining tools together in scripts or pipelines – Originally, input and output to workstations were slow and tedious, and this approach made things faster and more efficient. ...
... – More complex tasks can be accomplished by combining tools together in scripts or pipelines – Originally, input and output to workstations were slow and tedious, and this approach made things faster and more efficient. ...
Protection & Security
... Domain of Protection Who needs protection? System resources need protection resources include both hardware and software examples of software resources: files, programs, buffers, semaphores etc. examples of hardware resources: CPU, memory segments, printers, disks etc. think of each res ...
... Domain of Protection Who needs protection? System resources need protection resources include both hardware and software examples of software resources: files, programs, buffers, semaphores etc. examples of hardware resources: CPU, memory segments, printers, disks etc. think of each res ...
Operating Systems: Principles and Practice, Introduction
... • Lazowska, Spring 2012: “The text is quite sophisticated. You won't get it all on the first pass. The right approach is to [read each chapter before class and] re-read each chapter once we've covered the corresponding material… more of it will make sense then. ...
... • Lazowska, Spring 2012: “The text is quite sophisticated. You won't get it all on the first pass. The right approach is to [read each chapter before class and] re-read each chapter once we've covered the corresponding material… more of it will make sense then. ...
now
... CLI or command interpreter allows direct command entry ◦ Sometimes implemented in kernel, sometimes by systems program ◦ Sometimes multiple flavors implemented – shells ◦ Primarily fetches a command from user and executes it ◦ Sometimes commands built-in, sometimes just names of programs If the ...
... CLI or command interpreter allows direct command entry ◦ Sometimes implemented in kernel, sometimes by systems program ◦ Sometimes multiple flavors implemented – shells ◦ Primarily fetches a command from user and executes it ◦ Sometimes commands built-in, sometimes just names of programs If the ...
Agenda - Seneca - School of Information & Communications
... improved and distributed often Many users can spot bugs in the operating system or application if source code is “open” ...
... improved and distributed often Many users can spot bugs in the operating system or application if source code is “open” ...
Final Report
... The simulator reads or creates a file which represents the disk image, and keeps track of allocated and free blocks using a bit map. A typical exercise might be for students to write a program (in Java) which invokes various simulated operating system calls against a well-known disk image provided b ...
... The simulator reads or creates a file which represents the disk image, and keeps track of allocated and free blocks using a bit map. A typical exercise might be for students to write a program (in Java) which invokes various simulated operating system calls against a well-known disk image provided b ...
Ch 5 Quick Quiz
... T F 2. With sequential processing techniques, multiple tasks are performed at the exact same time. ...
... T F 2. With sequential processing techniques, multiple tasks are performed at the exact same time. ...
PowerPoint - cse.sc.edu
... Research, not commercial PDP-11 was popular with an unusable OS AT&T’s legal concerns – Not allowed to enter computer business but needed to write software to help with switches – Licensed cheaply or free ...
... Research, not commercial PDP-11 was popular with an unusable OS AT&T’s legal concerns – Not allowed to enter computer business but needed to write software to help with switches – Licensed cheaply or free ...
Operating-System Structures
... The program that reads and interprets control statements is called variously: Command-line interpreter Shell (in UNIX) Its function is to get and execute the next command statement. Operating System Services Program execution – system capability to load a program into memory and to run it. ...
... The program that reads and interprets control statements is called variously: Command-line interpreter Shell (in UNIX) Its function is to get and execute the next command statement. Operating System Services Program execution – system capability to load a program into memory and to run it. ...
Lecture Notes - UCLA Computer Science
... Files identified with one master copy residing at the server machine, but copies of (parts of) the file are scattered in ...
... Files identified with one master copy residing at the server machine, but copies of (parts of) the file are scattered in ...
Operating Systems CMPSC 473
... • OS competes with the processes for resources – E.g., OS uses disk to swap ...
... • OS competes with the processes for resources – E.g., OS uses disk to swap ...
NETWORK OPERATING SYSTEMS
... The term filesystem has two somewhat different meanings, both of which are commonly used. This can be confusing to novices, but after a while the meaning is usually clear from the context. One meaning is the entire hierarchy of directories (also referred to as the directory tree) that is used to org ...
... The term filesystem has two somewhat different meanings, both of which are commonly used. This can be confusing to novices, but after a while the meaning is usually clear from the context. One meaning is the entire hierarchy of directories (also referred to as the directory tree) that is used to org ...
virtual machine
... – To keep track of which users use how much and what kinds of computer resources • Protection and security – Protection • ensuring that all access to system resources is controlled ...
... – To keep track of which users use how much and what kinds of computer resources • Protection and security – Protection • ensuring that all access to system resources is controlled ...
hand-out - Jan Thorbecke
... processing, the human student finds it impossible (and expensive) to work successfully with four copies of the same book simultaneously open to four different chapters. Given the necessity for a linear ordering, I think that the ordering used in this book is the most effective. A final word. Chapter ...
... processing, the human student finds it impossible (and expensive) to work successfully with four copies of the same book simultaneously open to four different chapters. Given the necessity for a linear ordering, I think that the ordering used in this book is the most effective. A final word. Chapter ...
History of Unix OS - Seneca
... improved and distributed often Many users can spot bugs in the operating system or application if source code is “open” ...
... improved and distributed often Many users can spot bugs in the operating system or application if source code is “open” ...
lecture2
... Parameters stored in a block, or table, in memory, and address of block passed as a parameter in a register This approach taken by Linux and Solaris Parameters placed, or pushed, onto the stack by the program and popped off the stack by the operating system Block and stack methods do not lim ...
... Parameters stored in a block, or table, in memory, and address of block passed as a parameter in a register This approach taken by Linux and Solaris Parameters placed, or pushed, onto the stack by the program and popped off the stack by the operating system Block and stack methods do not lim ...
Introduction - USC Upstate: Faculty
... • The action of loading an operating system into memory from a powered-off state is known as booting or bootstrapping. • When a computer is turned on, it first executes code stored in a firmware component known as the BIOS (basic input/output system). • On modern systems, the BIOS loads into memory ...
... • The action of loading an operating system into memory from a powered-off state is known as booting or bootstrapping. • When a computer is turned on, it first executes code stored in a firmware component known as the BIOS (basic input/output system). • On modern systems, the BIOS loads into memory ...
History of Unix OS - Seneca
... improved and distributed often Many users can spot bugs in the operating system or application if source code is “open” ...
... improved and distributed often Many users can spot bugs in the operating system or application if source code is “open” ...
The most important program that runs on a computer
... The most important program that runs on a computer. Every general-purpose computer must have an operating system to run other programs. Operating systems perform basic tasks, such as recognizing input from the keyboard, sending output to the display screen, keeping track of files and directories on ...
... The most important program that runs on a computer. Every general-purpose computer must have an operating system to run other programs. Operating systems perform basic tasks, such as recognizing input from the keyboard, sending output to the display screen, keeping track of files and directories on ...
User view
... Operating system is an important part of every computer system. A computer system can be divided into four components; Hardware OS Application programs Users Hardware – provides basic computing resources CPU, memory, I/O devices Operating system Controls and coordinates use of hardware a ...
... Operating system is an important part of every computer system. A computer system can be divided into four components; Hardware OS Application programs Users Hardware – provides basic computing resources CPU, memory, I/O devices Operating system Controls and coordinates use of hardware a ...
OVERVIEW: Linux and Unix
... Dennis Ritchie sketched out an operating system that would meet Bell Labs' needs, soon become Unix. • In 1973, UNIX, was rewritten in C as Version 4 by Dennis Ritchie and Brian Kernighan. • Two major hot-beds of Unix development were at the University of California, Berkeley, which later became BSD ...
... Dennis Ritchie sketched out an operating system that would meet Bell Labs' needs, soon become Unix. • In 1973, UNIX, was rewritten in C as Version 4 by Dennis Ritchie and Brian Kernighan. • Two major hot-beds of Unix development were at the University of California, Berkeley, which later became BSD ...
2140702
... 6. Write a shell script which will generate first n fibonnacci numbers like: 1, 1, 2, 3, 5, 13,… 7. Write a menu driven shell script which will print the following menu and execute the given task. 8. MENU 9. Display calendar of current month 10. Display today’s date and time 11. Display usernames th ...
... 6. Write a shell script which will generate first n fibonnacci numbers like: 1, 1, 2, 3, 5, 13,… 7. Write a menu driven shell script which will print the following menu and execute the given task. 8. MENU 9. Display calendar of current month 10. Display today’s date and time 11. Display usernames th ...