You are the systems administrator for a large trust company. Most of the Linux servers in the company host databases that are accessed frequently by company employees. One particular Linux server has been reported as being very slow today. Upon further investigation using the top utility, you have found a rogue process that is wasting a great deal of system resources. Unfortunately, the rogue process is a database maintenance program and should be killed with caution. Which kill signal would you send this process and why? If the rogue process traps this signal, which other kill signals would you try? Which command could you use as a last resort to kill the rogue process

What are the relevent details of a trap?     Users with special logins that have administrator privilege are not subject to traps for restricted operations.     The trap is often an instruction that helps move from user-mode to kernel-mode by raising the privilege level to execute privileged operations. Upon returning, the privileges are reduced to their original level.     Privilege separation is only one step in the process of trying to make operating systems secure.     There exists a table that defines locations to go to for each of the defined traps.

You are working for an organisation that is using a very old web-based application that was developed in-house and is only used by members of the organisation.  The leader of the web development team has indicated that the application needs to be urgently redeveloped as it is dependent upon outdated frameworks that have recently been found to be vulnerable to SQL injection attacks, however the organisation is currently short on funding.  One of the security team has suggested using a web application firewall to prevent common attacks instead. (a) Explain the additional security that would be provided by the web application firewall. (b) Discuss any alternative or complimentary technologies that would assist in securing the application.

What happens to availability when the MTTR (time to failure) approaches zero? Is it possible to provide a precise description of the situation?