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(1) Write a DOS-like shell on top of the Bourne shell to satisfy the DOS users. Your program is invoked by and the familiar DOS prompt is displayed which shows the path of the current working directory.
You shell supports the following DOS commands: cd del ren more copy files copy file1 file2 xcopy xcopy/s xcopy /s deltree deltree/y deltree /y dir dir/w dir /w dir/p dir /p If the user command does not match any of the supported DOS commands, you shell should still send it to unix for execution.
(II) Write 2 sh scripts A. 'Makeusers' to create a bunch of user accounts on Linux. Reference to the Linux commands of adduser and useradd. Suppose a list of usernames is supplied in an ascii file 'classlist' as follows: tongf doej billw The script 'makeusers' will read the usernames from the file 'classlist' and create the 3 user accounts accordingly.
The script 'purgeusers' will read the usernames from the file 'classlist' and remove the 3 user accounts and the corresponding dirs and files accordingly.
The Shortest Job Next (SJN) algorithm queues processes in a way that the ones that use the shortest CPU cycle will be selected for running rst.
Develop a user mode command interpreter which support list-short.
Analysis and implementation of algorithms for memory allocation in operating system, Explain First- t and best- t methods are used in memory allocation in operating systems.
Forking the child process
Write a multi-threaded program to solve producer and consumer problem
n a competitive market place (pure competition) is it possible to continually sell your product at a price above the average cost of production.
Simulate the long-term scheduler, the short-term scheduler and the I/O scheduler of the computer using the First-Come-First-Serve algorithm.
Research paper discussing the issues with Trusted Platform Module (TPM)
Explain a complication that concurrent processing adds to an operating system.
Use the semaphore methods to control the concurrency of the solution
Virtual machines supported by a host operating system
Discuss an application that would benefit from the use of barrier synchronization
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