principles of network operating system ppt

Principles of Network and System Administration 2nd phần 3 pptx

... to the system before change strikes. A plan is needed for testing new versions of software. Package systems for software make this process easier, since one can allow several versions of software to ... which replace many of the older Unix equivalents, like ls and cp. GNU software has its own system of installation and set of standards. GNU will also eventually become an operating system in its own right. ... 4 Not all systems distinguish between target and device. On many systems you will ﬁnd only t or d but not both. 4.6 Installation of the operating system The installation process is one of the most...

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principles of network and system administration phần 4 ppt

Ngày tải lên: 14/08/2014, 12:20

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principles of network and system administration phần 7 ppt

Ngày tải lên: 14/08/2014, 12:20

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principles of network and system administration

... administration, the word system is used to refer both to the operating system of a computer and often, collectively the set of all computers that cooperate in a network. If we look at computer systems analytically, ... security. 2.3.3 Securable operating systems To distinguish them from insecure operating systems we shall refer to operating systems like Unix and NT as securable operating systems. This should not ... case. 1.9 The meta principles of system administration Many of the principles in this book derive from a single overriding issue: they address the predictability of a system. The term system clearly...

Ngày tải lên: 03/06/2014, 01:29

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Principles of Network and System Administration 2nd phần 2 doc

... There are two types of Windows system with separate software licenses: workstations and servers.Windowscanworkasastand-alonesystemorasaworkstation, integrated into a system of network services. ... mach. Knowing the operating system of a host is not sufﬁcient. We also need to know what kind of resources the host has to offer the network, so that we can later plan 60 CHAPTER 2. SYSTEM COMPONENTS Net ... (255.255.255.0) 72 CHAPTER 2. SYSTEM COMPONENTS 3. What effect does temperature have on computer systems? 4. What is the function of an operating system? (Hint: how do you deﬁne an operating system? ) 5. Why...

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Principles of Network and System Administration 2nd phần 4 potx

... build software systems which apply certain principles to the problem of management. Network management has, to some extent, been likened to the process of software develop- ment in the System ... competing system to SNMP called COPS-PR [101]. 6.3. NETWORK ADMINISTRATION MODELS 207 6.3 Network administration models The management of clusters of systems leads to the concept of logistic networks. Here ... territory of more intelligent agent systems like cfengine and PIKT. Despite the shortcomings of SNMP for host operations, many operating systems do deﬁne their own MIBs for the collection of system...

Ngày tải lên: 13/08/2014, 22:21

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Principles of Network and System Administration 2nd phần 5 pot

... freak coincidence of human social structures; it is a property of a kind of network known as a small-world network [319]. Deﬁnition 6 (Small-world network) . There is a class of highly clustered ... services, like web mail, often consist of a farm of PCs running FreeBSD Unix (this has retained the record for the most efﬁcient network handling of all the operating systems to date), backed ... study of networks reveals that networks with the small-world property also exhibit so-called ‘scale-free’ behavior, over a wide range of scales. In other words, over a wide range of scales, the networks...

Ngày tải lên: 13/08/2014, 22:21

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Principles of Network and System Administration 2nd phần 6 pot

... 303]. More often than not, performance tuning is related to the availability or sharing of system resources. This requires tuning the system kernel. The most conﬁgurable piece of software on the system ... plan for loss of some of the hosts. EXERCISES 327 8. What is meant by the environment of a system? 9. How does one ﬁnd the boundary between system and environment? 10. What kind of faults can ... services Network services are the crux of network cooperation (see section 3.5). They distinguish a cooperative network from a loose association of hosts. A community is bound together by a web of...

Ngày tải lên: 13/08/2014, 22:21

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Principles of Network and System Administration 2nd phần 7 doc

... Samba Samba is a free software solution to the problem of making Unix filesystems available to Windows operating systems. Windows NT uses a system of network file sharing based on their own SMB (Server ... Plan for mapping quality of experience onto physical measurables. 3 For a discussion of this point, see the follow-up book by the author: Scientific Principles of Network and System Administration, ... or /etc/filesystems. On Solaris systems it is called /etc/vfstab. The advantage of writing the disks in the filesystem table is that the mount commands will not be lost when we reboot our system. The filesystems...

Ngày tải lên: 13/08/2014, 22:21

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Principles of Network and System Administration 2nd phần 8 pps

... nature of possible threats to the security of a human–computer system. 444 CHAPTER 11. PRINCIPLES OF SECURITY Authentication is usually performed at the start of a session between client and system. ... examines ﬁlesystems. 4 As the reviewer of this book put it: ‘They’re done. Stick a fork in them.’ 446 CHAPTER 11. PRINCIPLES OF SECURITY 11.8.2 Denial of service (DoS) attacks Another type of attack ... the case of an accident. In the unlikely event of every host being destroyed simultaneously, downloading the software again from the network is the least of your worries! Reconstructing a system...

Ngày tải lên: 13/08/2014, 22:21

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Principles of Network and System Administration 2nd phần 9 potx

... impressions include the amount of dependency of a software component on other software systems, hosts or processes; also the dependency of a software system on the presence of a human being. In ref. ... of the environment around it. The system is open because input changes the state of the system s internal variables and output changes the state of the environment. Every piece of computer software ... basis of programming algorithms in computer software and the same thing applies to conglomerations of different software systems. The same principle applies to the storage of any kind of information....

Ngày tải lên: 13/08/2014, 22:21

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Principles of Network and System Administration 2nd phần 10 pps

... burned into the network interface. • Memory image: A copy of some software in the actual RAM of the system. Often used to refer to the resident size of a program, or the amount of memory actually ... memory image of a Perl program is often smaller than that of a shell script when all of the sub-programs of a shell script are taken into account. We have barely scratched the surface of Perl here. ... Self-monitoring and self-adapting operating systems. Proceedings of the Sixth Workshop on Hot Topics in Operating Systems, 1997. Appendix D Glossary • ACL: Access control list, a list of access rights to an...