12_Auth_nemo
... 1. If user “anonymous”, return okay; if not, set PAM_AUTHTOK to password, PAM_RUSER to name, and fail 2. Now check that password in PAM_AUTHTOK belongs to that of user in PAM_RUSER; if not, fail 3. Now see if user in PAM_RUSER named in /etc/ftpusers; if so, fail; if error or not found, succeed June ...
... 1. If user “anonymous”, return okay; if not, set PAM_AUTHTOK to password, PAM_RUSER to name, and fail 2. Now check that password in PAM_AUTHTOK belongs to that of user in PAM_RUSER; if not, fail 3. Now see if user in PAM_RUSER named in /etc/ftpusers; if so, fail; if error or not found, succeed June ...
PPTX - Duke Computer Science
... address space. Moreover, SIPS can safely execute at the same privileged level as the kernel. • Eliminating these hardware protection barriers reduces the cost to create and switch contexts between SIPs. • With software isolation, system calls and inter-process communication execute significantly fas ...
... address space. Moreover, SIPS can safely execute at the same privileged level as the kernel. • Eliminating these hardware protection barriers reduces the cost to create and switch contexts between SIPs. • With software isolation, system calls and inter-process communication execute significantly fas ...
slides
... P = { (o,r),(o,w)| o is an object in the system} Constraint on UA: Each user is assigned to exactly two roles xR and LW where x is the label assigned to the user and LW is the write role corresponding to the lowermost security level according to ≥ LBAC Constraint on sessions: Each session has exactl ...
... P = { (o,r),(o,w)| o is an object in the system} Constraint on UA: Each user is assigned to exactly two roles xR and LW where x is the label assigned to the user and LW is the write role corresponding to the lowermost security level according to ≥ LBAC Constraint on sessions: Each session has exactl ...
Desktop Scheduling: How Can We Know What the
... Our measurements were conducted on a 664 MHz Pentium 3 machine equipped with 256 MB RAM and a 3DFX Voodoo3 graphics accelerator with 16 MB RAM that supports OpenGL in hardware. The operating system is a 2.4.8 Linux kernel (RedHat 7.0), with the XFree86 4.1 X server. The clock interrupt rate was incr ...
... Our measurements were conducted on a 664 MHz Pentium 3 machine equipped with 256 MB RAM and a 3DFX Voodoo3 graphics accelerator with 16 MB RAM that supports OpenGL in hardware. The operating system is a 2.4.8 Linux kernel (RedHat 7.0), with the XFree86 4.1 X server. The clock interrupt rate was incr ...
Desktop scheduling: how can we know what the user wants?
... Only a subset of the peripheral devices in the system are of interest when trying to quantify the volume of interactions between the user and the various processes. These include the keyboard, mouse, screen, joystick, sound card, etc., and will be referred to collectively as HuC devices. The common ...
... Only a subset of the peripheral devices in the system are of interest when trying to quantify the volume of interactions between the user and the various processes. These include the keyboard, mouse, screen, joystick, sound card, etc., and will be referred to collectively as HuC devices. The common ...
Advanced Interactive Executive (AIX) operating system overview
... real hardware and provides a stable, high-level machine interface to the advanced hardware features and devices. (See Figure 3.) The kernel received corresponding enhancements to use the services of the VRM and to provide essential additional facilities. Although the VRM and the AIX kernel proper ha ...
... real hardware and provides a stable, high-level machine interface to the advanced hardware features and devices. (See Figure 3.) The kernel received corresponding enhancements to use the services of the VRM and to provide essential additional facilities. Although the VRM and the AIX kernel proper ha ...
6up-pdf - ETH Systems Group
... Environment, What will it see in_opt LPCTSTR CurrentDirectory, when it starts up? in LPSTARTUPINFO StartupInfo, out LPPROCESS_INFORMATION ProcessInformation ...
... Environment, What will it see in_opt LPCTSTR CurrentDirectory, when it starts up? in LPSTARTUPINFO StartupInfo, out LPPROCESS_INFORMATION ProcessInformation ...
Chapter 1 Slides
... Typically system has many processes, some user, some operating system running concurrently on one or more CPUs Concurrency by multiplexing the CPUs among the processes ...
... Typically system has many processes, some user, some operating system running concurrently on one or more CPUs Concurrency by multiplexing the CPUs among the processes ...
Threads
... Allows each thread to have its own copy of data Useful when you do not have control over the ...
... Allows each thread to have its own copy of data Useful when you do not have control over the ...
Concurrency
... As a program structuring device As a mechanism for portability to multiprocessors As a way to manage I/O and server concurrency ...
... As a program structuring device As a mechanism for portability to multiprocessors As a way to manage I/O and server concurrency ...
An I/O Architecture for Mikrokernel
... In such systems, applications either use the off-the-shelf system with its large functionality and driver base, or they use the core directly if the core’s specific properties are required. For example, a robot application may run collisionavoidance processes on the real-time core while long-term pl ...
... In such systems, applications either use the off-the-shelf system with its large functionality and driver base, or they use the core directly if the core’s specific properties are required. For example, a robot application may run collisionavoidance processes on the real-time core while long-term pl ...
Linux - the most important … Linux: SHELL ~$ command –options
... When your system boots, it reads a list of mounting instructions in the file /etc/fstab, which describes which device is mounted at which mount point in the directory tree. This takes care of the hard drives, but you may also have devices that are considered temporary, such as CD-ROMs, thumb drives, ...
... When your system boots, it reads a list of mounting instructions in the file /etc/fstab, which describes which device is mounted at which mount point in the directory tree. This takes care of the hard drives, but you may also have devices that are considered temporary, such as CD-ROMs, thumb drives, ...
Factored Operating Systems (fos)
... number of cores being managed has stayed relatively constant with the vast majority of SMP systems being two processor systems. With multicore chip designs, the number of cores will be expanding at an exponential rate therefore any operating system designed to run on multicores will need to embrace ...
... number of cores being managed has stayed relatively constant with the vast majority of SMP systems being two processor systems. With multicore chip designs, the number of cores will be expanding at an exponential rate therefore any operating system designed to run on multicores will need to embrace ...
2.01 - Avi Silberschatz's Home Page
... Some of them are simply user interfaces to system calls; others are ...
... Some of them are simply user interfaces to system calls; others are ...
Network Security: Intrusion Detection and Protection
... Stateholding attacks: The attacker tries to consume the normalizer’s memory by causing it to instantiate too many states. Common stateholding attacks are: SYN flooding: The attacker floods SYN packets so that the normalizer instantiates states for each connection. ACK flooding: If the normalizer res ...
... Stateholding attacks: The attacker tries to consume the normalizer’s memory by causing it to instantiate too many states. Common stateholding attacks are: SYN flooding: The attacker floods SYN packets so that the normalizer instantiates states for each connection. ACK flooding: If the normalizer res ...
ch01.pdf
... OS activities include Creating and deleting files and directories Primitives to manipulate files and dirs ...
... OS activities include Creating and deleting files and directories Primitives to manipulate files and dirs ...
Silberschatz/7e Lecture Notes
... Some of them are simply user interfaces to system calls; others are ...
... Some of them are simply user interfaces to system calls; others are ...
Towards High-Performance Application-Level Storage
... Figure 1: Overhead in µs of various Linux filesystem implementations, when conducting small, persistent writes. Our approach instead is to associate each application with the directories and files it manages, as if they were dynamically mounted network file systems. This way, an application is free ...
... Figure 1: Overhead in µs of various Linux filesystem implementations, when conducting small, persistent writes. Our approach instead is to associate each application with the directories and files it manages, as if they were dynamically mounted network file systems. This way, an application is free ...
Master - Anvari.Net
... Disadvantages of Rate-based IPS • Biggest problem with deploying rate-based IPS products is deciding what constitutes an overload. • For any rate-based IPS to work properly, need to know not only what "normal" traffic levels are (on a host-by-host and port-by-port basis) but also other network deta ...
... Disadvantages of Rate-based IPS • Biggest problem with deploying rate-based IPS products is deciding what constitutes an overload. • For any rate-based IPS to work properly, need to know not only what "normal" traffic levels are (on a host-by-host and port-by-port basis) but also other network deta ...