Linux - Rock Fort Networks
... types of hardwires in same way. Linux kernel and application programs supports their installation on any kind of hardware platform. Open Source:Linux source code is freely available and it is community based development project. Multi-User :Linux is a multiuser system means multiple users can access ...
... types of hardwires in same way. Linux kernel and application programs supports their installation on any kind of hardware platform. Open Source:Linux source code is freely available and it is community based development project. Multi-User :Linux is a multiuser system means multiple users can access ...
Fundamental Concepts of Operating Systems
... that multiple processes are running on the same hardware based on timesharing or multiplexing. A personal computer using network resources (like file server) is called a workstation. A PC or workstation serves one person at a time, and their OS focuses on responsiveness of the system to user events. ...
... that multiple processes are running on the same hardware based on timesharing or multiplexing. A personal computer using network resources (like file server) is called a workstation. A PC or workstation serves one person at a time, and their OS focuses on responsiveness of the system to user events. ...
Ch. 14 : UNIX Operating System with Linux
... Linux can run +1 program at a time using one or several processors. Operate on Intel’s x86 processors & other platforms including Alpha, Sparc, certain 6800 platforms, certain MIPS machines, and Power PCs. Allows several users to work on the same machine at same time. Linux supports pipes, IPC, sock ...
... Linux can run +1 program at a time using one or several processors. Operate on Intel’s x86 processors & other platforms including Alpha, Sparc, certain 6800 platforms, certain MIPS machines, and Power PCs. Allows several users to work on the same machine at same time. Linux supports pipes, IPC, sock ...
Linux
... a “command line” interface which allows the user to type in commands. These commands are translated by the shell into something the kernel can comprehend, and then executed by the kernel. • The Built-in System Utilities - are programs that allow a user to perform tasks which involve complex actions. ...
... a “command line” interface which allows the user to type in commands. These commands are translated by the shell into something the kernel can comprehend, and then executed by the kernel. • The Built-in System Utilities - are programs that allow a user to perform tasks which involve complex actions. ...
CS 519 -- Operating Systems -
... Live data must be copied out of a segment before the segment can be re-written The process of copying data out of a segment: cleaning A separate cleaner thread moves along the log, removes old segments from the end and puts live data into memory for rewriting in the next segment As a result ...
... Live data must be copied out of a segment before the segment can be re-written The process of copying data out of a segment: cleaning A separate cleaner thread moves along the log, removes old segments from the end and puts live data into memory for rewriting in the next segment As a result ...
Fundamental Concepts
... Must ensure that a user program could never gain control of the computer in monitor mode (I.e., a user program that, as part of its execution, traps if it executes a privileged instruction). K. Salah ...
... Must ensure that a user program could never gain control of the computer in monitor mode (I.e., a user program that, as part of its execution, traps if it executes a privileged instruction). K. Salah ...
Advanced Interactive Executive (AIX) operating system overview
... as sophisticated as those used in mainframe computers. There were many considerations that compelled us to build an operating system for the RT Personal Computer that incorporated many of the currently most advanced system concepts. The RT Personal Computer system includes sophisticated hardware fea ...
... as sophisticated as those used in mainframe computers. There were many considerations that compelled us to build an operating system for the RT Personal Computer that incorporated many of the currently most advanced system concepts. The RT Personal Computer system includes sophisticated hardware fea ...
Operating Systems
... Each file table entry contains: file status flag (read, write, append), current file offset, pointer to v-node table entry. 3. Each open file has a v-node structure: file type, pointers to functions that operate on the file. File owner, size, device, position on disk. ...
... Each file table entry contains: file status flag (read, write, append), current file offset, pointer to v-node table entry. 3. Each open file has a v-node structure: file type, pointers to functions that operate on the file. File owner, size, device, position on disk. ...
Work with Files and Directories
... The Windows Threat • Windows – a graphical user interface (GUI) that uses the mouse rather than arcane and complex command options to execute a job. • Windows first swept the desktop market (with Windows 3.1/95/98/Me) and then made significant inroads into the server market (with Windows NT/2000). ...
... The Windows Threat • Windows – a graphical user interface (GUI) that uses the mouse rather than arcane and complex command options to execute a job. • Windows first swept the desktop market (with Windows 3.1/95/98/Me) and then made significant inroads into the server market (with Windows NT/2000). ...
Lecture 6 File Systems
... • the number of blocks in the partition • the size of the blocks • a free-block count • free-block pointers ...
... • the number of blocks in the partition • the size of the blocks • a free-block count • free-block pointers ...
Operating System Security (II)
... USTC-21000201-OPERATING SYSTEMS; FALL 2014; INSTRUCTOR: CHI ZHANG ...
... USTC-21000201-OPERATING SYSTEMS; FALL 2014; INSTRUCTOR: CHI ZHANG ...
Layer 1 Process Management
... •All the user processes in the whole system are part of a single tree with init at the root. •During the initialization phase, the kernel starts the task, and then the memory manager, the file system, and any other servers that run in layer. When all of these have run and initialized themselves, the ...
... •All the user processes in the whole system are part of a single tree with init at the root. •During the initialization phase, the kernel starts the task, and then the memory manager, the file system, and any other servers that run in layer. When all of these have run and initialized themselves, the ...
Operating System
... procedures to invoke system calls, or by using utility-program such as shell. Here, some new terms came in picture such as kernel, shell, and system call. These are described below. __ Kernel: _ The kernel is the core of the UNIX operating system. UNIX uses microkernel approach, where code fro ...
... procedures to invoke system calls, or by using utility-program such as shell. Here, some new terms came in picture such as kernel, shell, and system call. These are described below. __ Kernel: _ The kernel is the core of the UNIX operating system. UNIX uses microkernel approach, where code fro ...
The concept of operating system
... Multiprogramming organizes jobs (code and data) so CPU always has one to execute A subset of total jobs in system is kept in memory One job selected and run via job scheduling When it has to wait (for I/O, for example), OS switches to another job ...
... Multiprogramming organizes jobs (code and data) so CPU always has one to execute A subset of total jobs in system is kept in memory One job selected and run via job scheduling When it has to wait (for I/O, for example), OS switches to another job ...
BackDoors
... Some intruders knew the administrator was checking the login program for tampering, so they modified in.telnetd. Within in.telnetd, it does several checks from the user for things like what kind of terminal the user was using. Typically, the terminal setting might be xterm or VT100. An intruder coul ...
... Some intruders knew the administrator was checking the login program for tampering, so they modified in.telnetd. Within in.telnetd, it does several checks from the user for things like what kind of terminal the user was using. Typically, the terminal setting might be xterm or VT100. An intruder coul ...
ppt
... – Isolation: Each application runs with its own UID in own VM • Provides memory protection • Communication limited to using Unix domain sockets • Only ping, zygote (spawn another process) run as root – Interaction: reference monitor checks permissions on intercomponent communication – Least Privileg ...
... – Isolation: Each application runs with its own UID in own VM • Provides memory protection • Communication limited to using Unix domain sockets • Only ping, zygote (spawn another process) run as root – Interaction: reference monitor checks permissions on intercomponent communication – Least Privileg ...
Ch 1 Getting Started with the Operating System
... If students have not installed or upgraded to Windows XP Professional on personal computer refer them to documentation that came with Windows software so they can initiate installation or upgrade. Good time to introduce students to your lab procedures and/or instructions for work to be done at home ...
... If students have not installed or upgraded to Windows XP Professional on personal computer refer them to documentation that came with Windows software so they can initiate installation or upgrade. Good time to introduce students to your lab procedures and/or instructions for work to be done at home ...
Linux Operating System
... There are a couple of special characters intercepted by the shell, bash. The character “”, an asterix, says “replace this word with all the files that will fit this specification”. So, the command cp data ˜/backup, like the one above, gets changed to cp data-new data 1 data 2 data 5 ˜/backup befor ...
... There are a couple of special characters intercepted by the shell, bash. The character “”, an asterix, says “replace this word with all the files that will fit this specification”. So, the command cp data ˜/backup, like the one above, gets changed to cp data-new data 1 data 2 data 5 ˜/backup befor ...
Micro-CernVM: Slashing the Cost of Building and
... enough operating system”, that is a stripped down version of an operating system tailored to only one or few applications and use cases. An image size of a virtual appliance can be as small as a few hundred megabytes. As we have seen maintaining the CernVM virtual appliance1 , even for a minimalisti ...
... enough operating system”, that is a stripped down version of an operating system tailored to only one or few applications and use cases. An image size of a virtual appliance can be as small as a few hundred megabytes. As we have seen maintaining the CernVM virtual appliance1 , even for a minimalisti ...
1. design principle
... The past few decades have seen a tremendous improvement on the design and performance of operating systems. However the fundamental services provided by an operating system remain the same. First they make computer hardware easier to use. Second the operating systems shares the resources among the d ...
... The past few decades have seen a tremendous improvement on the design and performance of operating systems. However the fundamental services provided by an operating system remain the same. First they make computer hardware easier to use. Second the operating systems shares the resources among the d ...
521481P INTRODUCTION TO THE USE OF WORKSTATION
... Kernel. The kernel is the brain of the operating system. Although kernels vary among operating systems, they all have some common characteristics. Kernels are responsible mainly for managing computer input/output (I/O), allocating system resources, and managing processes. Processes. Processes are th ...
... Kernel. The kernel is the brain of the operating system. Although kernels vary among operating systems, they all have some common characteristics. Kernels are responsible mainly for managing computer input/output (I/O), allocating system resources, and managing processes. Processes. Processes are th ...
Course\FOS\FOS Unit-1 2014
... Macintosh operating system, OS/2, and some versions of UNIX and Linux, provide a graphical user interface (GUI). Graphical user interfaces are so called because you use a mouse (or some other pointing device) to work with graphical objects such as windows, menus, icons, buttons, and other tools. Th ...
... Macintosh operating system, OS/2, and some versions of UNIX and Linux, provide a graphical user interface (GUI). Graphical user interfaces are so called because you use a mouse (or some other pointing device) to work with graphical objects such as windows, menus, icons, buttons, and other tools. Th ...
Network File System
... (b) File Descriptors: In UNIX and Windows, fds are unique to each process. In VxWorks fds are global entities, accessible by any task except for std input, std output and std error which can be task specific. (c) I/O Control: The specific parameters passed to ioctl() functions can differ between UNI ...
... (b) File Descriptors: In UNIX and Windows, fds are unique to each process. In VxWorks fds are global entities, accessible by any task except for std input, std output and std error which can be task specific. (c) I/O Control: The specific parameters passed to ioctl() functions can differ between UNI ...