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 forsoftware make this process easier, since one can allow several versions of softwareto ... 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 ownright. ... 4Not all systems distinguish between target and device. On many systems you willﬁnd 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 7 ppt

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principles of network and system administration

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... 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 cooperatein a network. If we look at computer systems analytically, ... security.2.3.3 Securable operating systemsTo 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 administrationMany of the principles in this book derive from a single overriding issue: theyaddress the predictability of a system. The term system clearly...

Principles of Network and System Administration 2nd phần 2 doc

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... There aretwo types of Windows system with separate software licenses: workstationsand 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 knowwhat kind of resources the host has to offer the network, so that we can later plan60 CHAPTER 2. SYSTEM COMPONENTSNet ... (255.255.255.0)72 CHAPTER 2. SYSTEM COMPONENTS3. 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...

Principles of Network and System Administration 2nd phần 4 potx

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... build softwaresystems 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 toSNMP called COPS-PR [101].6.3. NETWORK ADMINISTRATION MODELS 2076.3 Network administration modelsThe management of clusters of systems leads to the concept of logistic networks.Here ... territory of moreintelligent agent systems like cfengine and PIKT.Despite the shortcomings of SNMP for host operations, many operating systemsdo deﬁne their own MIBs for the collection of system...

Principles of Network and System Administration 2nd phần 5 pot

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... freak coincidence of humansocial 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 hasretained 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 propertyalso exhibit so-called ‘scale-free’ behavior, over a wide range of scales. In otherwords, over a wide range of scales, the networks...

Principles of Network and System Administration 2nd phần 6 pot

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... 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 conﬁgurablepiece of software on the system ... plan for loss of some of the hosts.EXERCISES 3278. 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). Theydistinguish a cooperative network from a loose association of hosts. A communityis bound together by a web of...

Principles of Network and System Administration 2nd phần 7 doc

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... SambaSamba is a free software solution to the problem of making Unix filesystemsavailable 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.3For 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 notbe lost when we reboot our system. The filesystems...

Principles of Network and System Administration 2nd phần 8 pps

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... nature of possible threats to the security of a human–computer system. 444 CHAPTER 11. PRINCIPLES OF SECURITYAuthentication is usually performed at the start of a session between client and system. ... examines ﬁlesystems.4As the reviewer of this book put it: ‘They’re done. Stick a fork in them.’446 CHAPTER 11. PRINCIPLES OF SECURITY11.8.2 Denial of service (DoS) attacksAnother type of attack ... the case of an accident.In the unlikely event of every host being destroyed simultaneously, downloadingthe software again from the network is the least of your worries!Reconstructing a system...

Principles of Network and System Administration 2nd phần 9 potx

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... impressions include the amount of dependency of a softwarecomponent 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 openbecause input changes the state of the system s internal variables and outputchanges the state of the environment. Every piece of computer software ... basis of programmingalgorithms 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....

Principles of Network and System Administration 2nd phần 10 pps

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... 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 memoryactually ... memoryimage of a Perl program is often smaller than that of a shell script when all of thesub-programs of a shell script are taken into account. We have barely scratchedthe surface of Perl here. ... Self-monitoring and self-adapting operating systems. Proceedings of the Sixth Workshop on Hot Topics in Operating Systems, 1997.Appendix DGlossary• ACL: Access control list, a list of access rights to an...