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011300 Intro To Dos
1. Introduction to DOS CTIN January 13, 2000 Sandy Bacik, Senior Security Consultant Breakwater Security Associates
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3. What is an operating system? It manages an environment that contains working programs and grunt workers supplying subtasks, when requested to perform an action.
4. DOS D isk O perating S ystem An operating system that deals with hard disks. DOS worries about how files are stored and how to access them.
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10. Long Filenames to Short Filenames (1) No 2 files can have the same LFN and/or SFN If the LFN fits the SFN standard, the LFN and the SFN are the same.
16. Deleting a File - What Happens? The data is not erased from your disk. 1. 0 is placed in all the cluster locations in the FAT that belong to that file. 2. It changes the very first entry in the directory entry from ASCII to the special value E5h, digital value 229, and extended ASCII value lower case sigma.
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20. Files A place to store data Directories A place to store files
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22. Pathname A sequence of directory names followed by a file name. Path Similar to a pathname, but does not contain the file name.
We are going to review the simple things of how the boot process works and what is actually happening with the box, then review how a hard disk drive is setup and how it works, then we will begin to get into how the DOS operating system works. In a later sessions we will be reviewing DOS commands and what we can do with them.
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