Information security policy: Information security policy defines the set of rules of all organization for security purpose. It helps the employees what an organization required, how to complete the target and where it wants to reach. It helps to manage data access, web-browsing behaviors, passwords usage and encryption, email attachments, etc. It is designed to provide structure in the workplace, create a productive and effective work place. It is free from unnecessary distractions.

Question

Whentheuserenters!!,themostrecentcommandinthehistoryisexecuted.In the example above, if the user entered the command: Osh> !! The ‘ls -l’ command should be executed and echoed on user’s screen. The command should also be placed in the history buffer as the next command. Whentheuserentersasingle!followedbyanintegerN,theNthcommandin the history is executed. In the example above, if the user entered the command: Osh> ! 3 The ‘ps’ command should be executed and echoed on the user’s screen. The command should also be placed in the history buffer as the next command. Error handling: The program should also manage basic error handling. For example, if there are no commands in the history, entering !! should result in a message “No commands in history.” Also, if there is no command corresponding to the number entered with the single !, the program should output "No such command in history."

Answer 1

Question

Chapter 4, Problem 1E

Program Plan Intro

Information security policy:

Information security policy defines the set of rules of all organization for security purpose.

It helps the employees what an organization required, how to complete the target and where it wants to reach.

It helps to manage data access, web-browsing behaviors, passwords usage and encryption, email attachments, etc.

It is designed to provide structure in the workplace, create a productive and effective work place.

It is free from unnecessary distractions.

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Whentheuserenters!!,themostrecentcommandinthehistoryisexecuted.In the example above, if the user entered the command: Osh> !! The ‘ls -l’ command should be executed and echoed on user’s screen. The command should also be placed in the history buffer as the next command. Whentheuserentersasingle!followedbyanintegerN,theNthcommandin the history is executed. In the example above, if the user entered the command: Osh> ! 3 The ‘ps’ command should be executed and echoed on the user’s screen. The command should also be placed in the history buffer as the next command. Error handling: The program should also manage basic error handling. For example, if there are no commands in the history, entering !! should result in a message “No commands in history.” Also, if there is no command corresponding to the number entered with the single !, the program should output "No such command in history."

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