The document discusses how operating systems manage files and memory allocation. It explains that from the computer's perspective, there are no actual files, only blocks of allocated and unallocated memory. The file manager in the operating system creates the illusion of files and folders by tracking memory locations and implementing file allocation policies. Files can be stored contiguously, non-contiguously, or through indexed allocation with pointers. Access controls determine which users can access which files.
A closer quick understanding of different backup technologies and pros and cons backup & recovery,ntbackup,types of backups, windows backup path so far, differential backup, incremental backup, full backup, mirror backup. If you have have anyqueries please contact me at jabvtl@gmail.com
Disk partitioning or disk slicing is the creation of one or more regions on secondary storage, so that each region can be managed separately.
Don't know how to partition your disk? Go through the presentation to get aware about this.
A closer quick understanding of different backup technologies and pros and cons backup & recovery,ntbackup,types of backups, windows backup path so far, differential backup, incremental backup, full backup, mirror backup. If you have have anyqueries please contact me at jabvtl@gmail.com
Disk partitioning or disk slicing is the creation of one or more regions on secondary storage, so that each region can be managed separately.
Don't know how to partition your disk? Go through the presentation to get aware about this.
Autopsy 3: Free Open Source End-to-End Windows-based Digital Forensics PlatformBasis Technology
Autopsy™ is the premier free and open source end-to-end digital forensics platform built by Basis Technology and the digital forensics open source community. The platform has been in development since OSDF Con 2010, based on intense interest and collaboration from the digital forensics community, which determined the need for an open source end-to-end forensics platform that runs on Windows systems.
Autopsy version 3 is a complete rewrite from version 2 and is built to enable the creation of fast, thorough, and efficient hard drive investigation tools that can evolve with digital investigators’ needs. The standard installation includes features that rival commercial closed source offerings, without the associated costs.
FEATURES
Triage capability and real-time alerting
Automated workflow based on The Sleuth Kit™
Windows installation
Case management and report generation
Recent user activity extraction including: web history, recent documents, bookmarks, downloads, and registry analysis
Keyword and pattern search including: phone numbers, email addresses, URLs, and IP addresses
Hash lookup
Interesting files detection and timeline viewing
...and much more
For digital forensics investigators and analysts, there are numerous advantages to using open source software and software built on open source platforms like Autopsy and The Sleuth Kit:
• Transparent evidence extraction: Open source platforms allow you to look at the source code and to verify that the software is performing its functions in a forensically sound way. This can prove to be critical when testifying or preparing for litigation.
• Easily extensible: Open source platforms grow organically and as the needs of their consituents and users change, so does their functionality.
• Active community of users and developers: In addition to commercial support offered by Basis Technology,
there is a wealth of information that is available in a community that has evolved over the last 11 years where both users and developers are actively working to improve the software platform. This free knowledge base is an extremely powerful value add to your purchased enterprise support.
Facebook Forensics Toolkit(FFT) is a very simple Forensic Tool to find out people's personal and behavioral information through extracting data from their Facebook profile .
All data and programs are stored in a computer as Files and Folders.
Folders are containers (holders) of files.
Files and folders can appear at any level, similar to a family tree.
It has a path because you are taking exact path to find this file.
Citrix is an American corporation that produces software designed to facilitate secure access to applications and content. Citrix offers products for Windows, Macintosh, and Linux platforms. The company was founded in 1989 and currently has branches in several countries.
In many ways, directories are treated like files. They can be created, deleted, moved and copied from Nautilus or from a shell prompt, using commands similar to those for files.
Creating Directories
You must have write permissions in a directory in order to create a new sub-directory. Most users have these permissions in their home directory (and its sub-directories) and the /tmp/ directory.
To create a new directory with Nautilus, navigate to the location of your new directory. Right-click in a blank portion of the window and select Create Folder. A new folder icon appears with the highlighted text untitled folder. Type a name for your folder and press [Enter].
To create a new directory using a shell prompt, use the command mkdir. Enter: mkdir <directory-name>, replacing <directory-name> with the intended title of the new directory.
Deleting Directories
To delete a directory from Nautilus, right click on it and choose Move to Trash, or click and drag the icon to the Trash on the Desktop.
To delete an empty directory from a shell prompt, enter the command rmdir. To delete a directory that may not be empty (and consequently everything inside that directory), enter the command rm -rf <directory>. Refer to Section 4.5.5 Delete files with rm for more information regarding the rm command.
Dot Directories
Applications create "dot" directories as well as dot files. Dot files are a single hidden configuration file — a dot directory is a hidden directory of configuration and other files required by the application. The non-configuration files in these directories are generally user-specific, and will be available only to the user who installed them.
Devops for beginners is basically for the developers who really want to jumps towards DevOps processes and tools. Guide will give basic about what is cloud and virtualisation ?
What are different clouds solutions available?
Most useful and used linux commands with detail description about them.
Linux directory structure and usage.
Basically it will cover all the basics of Linux Administration and cloud concepts.
Introduction to command line tools for *NIX (UNIX (like OS X and Solaris/SunOS), BSD, & GNU/Linux) environments. I made this presentation originally for the LUG@UCF when I was an undergrad but still contains valid information. Hope you find it useful.
BITS: Introduction to Linux - Software installation the graphical and the co...BITS
This slide is part of the BITS training session: "Introduction to linux for life sciences."
See http://www.bits.vib.be/index.php?option=com_content&view=article&id=17203890%3Abioperl-additional-material&catid=84&Itemid=284
This presentation will provide the information about the Linux Root File systems and its hierarchy. So any technocrate who is willing to gain info about root files of Linux can easily understand . preffered for Embedded system design Students who are pursuing diploma courses in various CDAC centers.
BITS: Introduction to Linux - Text manipulation tools for bioinformaticsBITS
This slide is part of the BITS training session: "Introduction to linux for life sciences."
See http://www.bits.vib.be/index.php?option=com_content&view=article&id=17203890%3Abioperl-additional-material&catid=84&Itemid=284
Evaluating Teaching: SECTIONS.
Check out:
Bates, A. W., & Poole, G. (2003). Effective Teaching with Technology in Higher Education: Foundations for Success. Jossey-Bass, An Imprint of Wiley. 10475 Crosspoint Blvd, Indianapolis, IN 46256.
Evaluating Teaching: Anstey and Watson Rubric
Check out:
Lauren M. Anstey & Gavan P.L. Watson. (2018), Rubric for eLearning Tool Evaluation. Centre for Teaching and Learning, Western University,
http://creativecommons.org/licenses/by-n c-sa/4.0/
Designing Teaching: ASSURE
Check out:
Heinich, R., Molenda, M., & Russell, J. D., (1993). Instructional Media and The New
Technologies of Instruction. New York: Macmillan
Designing Teaching: Laurilliard's Learning TypesDamian T. Gordon
Designing Teaching: Laurilliard's Learning Types
Check out:
Laurillard, D., 2013. Teaching as a design science: Building pedagogical patterns for learning and technology. Routledge.
Designing Teaching: Elaboration Theory
Check out:
Reigeluth, C. & Stein, F. (1983). The elaboration theory of instruction. In C. Reigeluth (ed.), Instructional Design Theories and Models. Hillsdale, NJ: Erlbaum Associates.
The Roman Empire A Historical Colossus.pdfkaushalkr1407
The Roman Empire, a vast and enduring power, stands as one of history's most remarkable civilizations, leaving an indelible imprint on the world. It emerged from the Roman Republic, transitioning into an imperial powerhouse under the leadership of Augustus Caesar in 27 BCE. This transformation marked the beginning of an era defined by unprecedented territorial expansion, architectural marvels, and profound cultural influence.
The empire's roots lie in the city of Rome, founded, according to legend, by Romulus in 753 BCE. Over centuries, Rome evolved from a small settlement to a formidable republic, characterized by a complex political system with elected officials and checks on power. However, internal strife, class conflicts, and military ambitions paved the way for the end of the Republic. Julius Caesar’s dictatorship and subsequent assassination in 44 BCE created a power vacuum, leading to a civil war. Octavian, later Augustus, emerged victorious, heralding the Roman Empire’s birth.
Under Augustus, the empire experienced the Pax Romana, a 200-year period of relative peace and stability. Augustus reformed the military, established efficient administrative systems, and initiated grand construction projects. The empire's borders expanded, encompassing territories from Britain to Egypt and from Spain to the Euphrates. Roman legions, renowned for their discipline and engineering prowess, secured and maintained these vast territories, building roads, fortifications, and cities that facilitated control and integration.
The Roman Empire’s society was hierarchical, with a rigid class system. At the top were the patricians, wealthy elites who held significant political power. Below them were the plebeians, free citizens with limited political influence, and the vast numbers of slaves who formed the backbone of the economy. The family unit was central, governed by the paterfamilias, the male head who held absolute authority.
Culturally, the Romans were eclectic, absorbing and adapting elements from the civilizations they encountered, particularly the Greeks. Roman art, literature, and philosophy reflected this synthesis, creating a rich cultural tapestry. Latin, the Roman language, became the lingua franca of the Western world, influencing numerous modern languages.
Roman architecture and engineering achievements were monumental. They perfected the arch, vault, and dome, constructing enduring structures like the Colosseum, Pantheon, and aqueducts. These engineering marvels not only showcased Roman ingenuity but also served practical purposes, from public entertainment to water supply.
2024.06.01 Introducing a competency framework for languag learning materials ...Sandy Millin
http://sandymillin.wordpress.com/iateflwebinar2024
Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
This webinar will introduce you to my framework, highlighting the key competencies I identified from my research. It will also show how anybody involved in language teaching (any language, not just English!), teacher training, managing schools or developing language learning materials can benefit from using the framework.
We all have good and bad thoughts from time to time and situation to situation. We are bombarded daily with spiraling thoughts(both negative and positive) creating all-consuming feel , making us difficult to manage with associated suffering. Good thoughts are like our Mob Signal (Positive thought) amidst noise(negative thought) in the atmosphere. Negative thoughts like noise outweigh positive thoughts. These thoughts often create unwanted confusion, trouble, stress and frustration in our mind as well as chaos in our physical world. Negative thoughts are also known as “distorted thinking”.
Synthetic Fiber Construction in lab .pptxPavel ( NSTU)
Synthetic fiber production is a fascinating and complex field that blends chemistry, engineering, and environmental science. By understanding these aspects, students can gain a comprehensive view of synthetic fiber production, its impact on society and the environment, and the potential for future innovations. Synthetic fibers play a crucial role in modern society, impacting various aspects of daily life, industry, and the environment. ynthetic fibers are integral to modern life, offering a range of benefits from cost-effectiveness and versatility to innovative applications and performance characteristics. While they pose environmental challenges, ongoing research and development aim to create more sustainable and eco-friendly alternatives. Understanding the importance of synthetic fibers helps in appreciating their role in the economy, industry, and daily life, while also emphasizing the need for sustainable practices and innovation.
The French Revolution, which began in 1789, was a period of radical social and political upheaval in France. It marked the decline of absolute monarchies, the rise of secular and democratic republics, and the eventual rise of Napoleon Bonaparte. This revolutionary period is crucial in understanding the transition from feudalism to modernity in Europe.
For more information, visit-www.vavaclasses.com
3. BELIEVE IT OR NOT…
From the computer’s point of view, there is
no such thing as a file.
It is only because the operating system is
creating the illusion of a file that they exist
From the computer’s point of view, there is
only blocks of memory, either allocated or
unallocated.
Damian’s
4. The File Manager (or File Management
System) is the manager in the Operating
System that creates the illusion that there are
files and folders being stored in computer
memory.
Operating System Files and
Folders
Memory
LocationsHardware
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16. The File Manager
◦ Keeps track of where files are stored
◦ Determines how the files are stored
◦ Follows operating system file allocation policies
◦ Uses available storage space efficiently for files
◦ Creates a record/log of all file usage
◦ Allocates a file to a user if is free, and if they are
permitted access to it.
◦ De-allocates file when user finished with it.
17. The file manager ALLOCATES a file by reading
it from the hard disk and loading it into
memory while updating its record of who is
using what file.
The file manager DEALLOCATES a file by
updating the file tables and rewriting the file
(if changed) to the hard disk. Any processes
waiting to access the file will be notified.
18. Some definitions:
◦ A FIELD is a collection of bytes that can be
identified by a user, and has a type and size.
◦ A RECORD is a collection of related FIELDS.
◦ A FILE is a collection of records.
◦ A DIRECTORY (or FOLDER) is a special type of file
that which has lists of files and their attributes.
19. Typical things you can do with a file are:
◦ CREATE
◦ OPEN
◦ DELETE
◦ RENAME
◦ COPY
◦ etc.
21. The name of a file is usually in two parts:
◦ MakeABackup.bat
22. The name of a file is usually in two parts:
◦ MakeABackup.bat
Filename
23. The name of a file is usually in two parts:
◦ MakeABackup.bat
Filename extension
24. .avi Microsoft Video for Windows movie
.dbf dbase II, III, IV data file
.doc(x) Microsoft Word for Windows
.gif Graphics Interchange Format
.htm Hypertext Markup Language (common web page file)
.html Hypertext Markup Language (common web page file)
.jpg JPEG graphic file
.mpg MPEG Video file
.mid MIDI music file
.mov QuickTime movie
25. .pdf Adobe Portable Document Format file
.ppt(x) PowerPoint file
.psd Photoshop file
.qxd QuarkXPress file
.rm Real Audio/Video streaming file
.rtf Rich Text Format
.tif TIFF graphic file
.txt ASCII text file
.wav Sound file
.xls(x) Excel spreadsheet
26. The full filename includes path information:
C:WINDOWSsystem32MakeABackup.bat
Filename extension
27. The full filename includes path information:
C:WINDOWSsystem32MakeABackup.bat
Filename extensionpath
28. The full filename includes path information:
C:WINDOWSsystem32MakeABackup.bat
Filename extensionpath
29. If I am in the following folder:
C:WINDOWSsystem32BackupFolder
Then the address of the file is:
..MakeABackup.bat
30. If I am in the following folder:
C:WINDOWSsystem32BackupFolder
Then the address of the file is:
..MakeABackup.bat
31. The Operating System store files as records in
memory, where many records make up a
single file.
There are three main ways a file is physically
stored in memory:
◦ Contiguous Storage
◦ Non-contiguous Storage
◦ Indexed Storage
32.
33. Contiguous Storage means that records of a
file are stored one after another.
It is a very simple policy to implement, and
once you have found the start of the file, it’s
very easy to find the rest of it.
47. The problem with is that if you have expand
the file, you either need to have free space
allocated at the end, or copy the whole file to
a different location on the disk that has
enough space.
48. Non-contiguous Storage means that records
of a file are stored where ever there is free
space.
The file manager will try to put as much of it
together as possible, but there will be other
part spread out over the disk.
These extra bits are sometimes called extents
and these are linked together with pointers.
This means there is no easy way to determine
the exact location of a record in a file.
98. v w x y za b c d e f g h
So how does it work with
an INDEX BLOCK?
99. v w x y za b c d e f g h
File Address Size Next
File 1 1 4 9
File 1 9 4 -
File 2 15 5 -
INDEX BLOCK:
100. v w x y za b c d e f g h
File Address Size Next
File 1 1 4 9
File 1 9 4 -
File 2 15 5 -
INDEX BLOCK:
101. v w x y za b c d e f g h
File Address Size Next
File 1 1 4 9
File 1 9 4 -
File 2 15 5 -
INDEX BLOCK:
102. v w x y za b c d e f g h
File Address Size Next
File 1 1 4 9
File 1 9 4 -
File 2 15 5 -
INDEX BLOCK:
103. v w x y za b c d e f g h
File Address Size Next
File 1 1 4 9
File 1 9 4 -
File 2 15 5 -
INDEX BLOCK:
104. This support both sequential and direct
access to records, and for larger files there
can be multiple indexes.
105. The Access Control Matrix shows the access
that each user has for each file on the
system. The possible accesses are:
◦ R: Read
◦ W: Write
◦ E: Execute
◦ D:Delete
107. Mary Anne Tom Bob Lyn
Word.
exe
RWED --E- --E- RWED R-E-
Lect1.
ppt
---- R-E- R-E- R--- RWE-
Scan.
Exe
R-E- RW-- R-E- R-E- R-ED
Chrome.
exe
R-E- RWE- R-E- RWED --E-
108. In DOS the Access Controls are:
◦ R: Read
◦ W: Write
◦ C: Change
◦ F: Full Control
109. In DOS access to a file can assigned to one of
two groups:
User
User Group
110. In DOS if we want to grant permissions to
file, e.g. MakeABackup.bat, we do:
cacls
111. In DOS if we want to grant permissions to
file, e.g. MakeABackup.bat, we do:
cacls filename arguments
112. In DOS if we want to grant permissions to
file, e.g. MakeABackup.bat, we do:
cacls filename [/T] [/M] [/L] [/S[:SDDL]] [/E]
[/C] [/G user:?] [/R user [...]] [/P user:? [...]]
[/D user [...]]
113. In DOS cacls works as follows:
Argument Description
filename Display access control lists (ACLs) of file
/T Changes ACLs of specified files in the
current directory and all subdirectories.
/M Changes ACLs of volumes mounted to a
directory.
/L Work on the Symbolic Link itself versus the
target.
/S Displays the SDDL string for the DACL.
/S:SDDL Replaces the ACLs with those specified in
the SDDL string (not valid with /E, /G, /R,
/P, or /D).
114. In DOS cacls works as follows:
Argument Description
/E Edit ACL instead of replacing it.
/C Continue on access denied errors.
/G user:? Grant specified user access rights.
? can be: R, W, C, or F
/R user Revoke specified user's access rights (only
valid with /E).
/P user:? Replace specified user's access rights.
? can be: R, W, C, or F
/D user Deny specified user access.
115. Add Read-Only permission to a single file
CACLS MakeABackup.bat /E /G "Power Users":R
Add Full Control permission to a second group of users
CACLS MakeABackup.bat /E /G "FinanceUsers":F
Now revoke the Read permissions from the first group
CACLS MakeABackup.bat /E /R "Power Users"
116. Now give the first group Full Control
CACLS MakeABackup.bat /E /G "Power Users":F
Give Finance group Full Control of folder and all sub-folders
CACLS c:docswork /E /T /C /G "FinanceUsers":F
117. In Linux/Unix the Access Controls are:
◦ R: Read
◦ W: Write
◦ X: Execute
118. In Linux/Unix access to a file can assigned to
one of three groups:
User
User Group
World
119. In Linux/Unix access to a file can assigned to
one of three groups:
User -you
User Group – everyone in your group
World – everyone with a login to the system
120. In Linux/Unix access to a file can assigned to
one of three groups:
-rwxrwxrwx
User User Group World
121. In Linux/Unix access to a file can assigned to
one of three groups:
-rwxrwxrwx
-111111111
122. In Linux/Unix access to a file can assigned to
one of three groups:
-rwxr-xr-x
-111101101
123. In Linux/Unix access to a file can assigned to
one of three groups:
-rwx--x--x
-101001001
124. In Linux/Unix access to a file can assigned to
one of three groups:
-rwxrwxrwx
-111111111
- 7 7 7
125. In Linux/Unix access to a file can assigned to
one of three groups:
-rwxr-xr-x
-111101101
- 7 5 5
126. In Linux/Unix access to a file can assigned to
one of three groups:
-rwx--x--x
-111001001
- 7 1 1
127. If we want to grant permissions to file, e.g.
MakeABackup.bat, we do:
chmod 755 MakeABackup.sh
chmod 777 MakeABackup.sh
chmod 700 MakeABackup.sh
128. In Linux/Unix, access to a file can assigned to
one of three groups:
-rwxrwxrwx
User User Group World
129. In Linux/Unix, access to a folder/directory
can assigned to one of three groups:
drwxrwxrwx
User User Group World