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System Programming And Operating System D M Dhamdhere Pdf
It was already mentioned above that a secure operating system does not necessarily require isolation of the userland and the kernel. Thus the operating system should provide proper isolation between the userland and kernel. For example, the system should not allow the entry of some of the userland binary executable into the kernel. Furthermore, the operating system should not fail to provide isolation between the userland and the system-provided binary executable, or the system-provided binary executable and the userland binary executable.
Introduction to operating systems: Operating system design and process. Operating system: Principles and design models. Operating system concepts, organizations and implementation. Operating system kernel: separation of hardware, operating system services, application software. Operating system kernel: separation of hardware, operating system services, application software. Operating system component: Input/output, Multics kernel, Multics. Threads in operating system.
Process management: Process scheduling and scheduling algorithms. Running processes and process isolation. Processes containment. Process control: set, suspend, and resume. Processes synchronization: conditions, events, locks, mutexes. Threads synchronization. Processes priority: scheduling, scheduling classes, scheduling algorithms. Processes migration. Process migration policies. Processes scheduling algorithms. Processes priority.
Basic concepts of distributed computing. Motivation for distribution. Key problems in distributed computing. All challenges faced by a distributed computing platform.
Hardness results: HADOOP 3. A E-d H A O U P S. P A R I S U M E R V I. T C O M I C S. O N B I T E C O N I P E T. O R G. V 2.0
Distributed computing and containers. Linux containers. Docker. Mesos, Tasktory and Pivotal. Kubernetes. Arch Linux
Flat Networks, Time-domain replication and replica protection. Infrastructure for content distribution – PeerFinder based protocols. (IANA) DNS, DNS-SD, EDNS. (IANA) NTP. NAT traversal. Server loads in Internet. IPv6 and mobility. Mobile IPv6
A short introduction to distributed programming languages (D-LLVM). Case studies: Lustre and PBS, BlazeDS and GlassFish and Scala and Spark.
Once a user logs in to the system, a machine generated temporary key is generated for that user. This key is also stored in the Operating system. Thus the sender and receiver of the message can communicate with the help of this key ID. We know that at the time of logging, a machine generated temporary key is generated for the user. In Unix the temporary key is stored in the file with the name of the user. In the operating system, this temporary key is used to decrypt the data. Once the user logs in this temporary key is used to decrypt the user data and all the resources in the operating system. For instance the keys for email is encrypted. Thus the sender and receiver use the public key to send the data. This key ID is stored by the operating system. In the email client like thunderbird or Lotus Notes, these keys are used to decrypt and verify the message. Thus the user data is secured. Last Log Out Time: The operating system should record the last log out time of the user and this information can be used for the purpose of auditing security policy. For instance, if a user is not allowed to use the computer for a certain period, the log out time can be helpful for accessing the log out time. File system: The operating system should provide the facility to protect the files. The file system has a four level of protection. Firstly file system must provide access level to the file system. In this level user can access only files of their user. That is file system has an access control list. If the user wants to read the file, the permission to read the file should be generated. Thus the file system uses encryption algorithm to provide the file access permission level. 5ec8ef588b
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