File systems linux class 8
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This document provides an overview of file systems, including: - File systems separate data into named files and provide structure and logic for managing these files. - There are many different types of file systems designed for different storage media and applications. - Common file systems for Linux include Ext2, Ext3, Ext4, and ZFS. Ext2-4 are suitable for most systems while ZFS is better for storage servers with multiple disks. - Commands covered include find, locate, updatedb, wildcards, soft/hard links, file ownership, help utilities, tab completion, and redirection.
File systems linux class 8
- 1. File Systems
- 2. File Systems By : Khawar Nehal 8 October 2021
- 3. Agenda File system types Some commands Find locate and updatedb Wildcards Linking and Links File ownership Getting help Tab completion Redirection
- 4. File System Types In computing, file system or filesystem is a method and data structure that the operating system uses to control how data is stored and retrieved. Without a file system, data placed in a storage medium would be one large body of data with no way to tell where one piece of data stops and the next begins.
- 6. File System Types By separating the data into pieces and giving each piece a name, the data is easily isolated and identified. Taking its name from the way paper-based data management system is named, each group of data is called a "file." The structure and logic rules used to manage the groups of data and their names is called a "file system."
- 7. File System Types There are many different kinds of file systems. Each one has different structure and logic, properties of speed, flexibility, security, size and more. Some file systems have been designed to be used for specific applications. For example, the ISO 9660 file system is designed specifically for optical discs.
- 8. File System Types File systems can be used on numerous different types of storage devices that use different kinds of media. As of 2019, hard disk drives have been key storage devices and are projected to remain so for the foreseeable future.
- 9. File System Types Other kinds of media that are used include SSDs, magnetic tapes, and optical discs. In some cases, such as with tmpfs, the computer's main memory (random- access memory, RAM) is used to create a temporary file system for short-term use.
- 10. File System Types Some file systems are used on local data storage devices; others provide file access via a network protocol (for example, NFS, SMB, or 9P clients). Some file systems are "virtual", meaning that the supplied "files" (called virtual files) are computed on request (such as procfs and sysfs) or are merely a mapping into a different file system used as a backing store.
- 11. File System Types Good summary https://en.wikipedia.org/wiki/File_system Comparison https://en.wikipedia.org/wiki/Comparison_of_file_systems
- 12. Important ones to know The ones to know are ext2,3,4 and ZFS. The others are for advanced specific cases when the above ones are not capable or compatible. An example is SSD Drives and NVRAM. Not part of this intro course.
- 13. Important ones to know Ext2, ext3 and ext4 are commonly used in Linux. When you have less than 3 harddisks in a machine. ZFS can be used for making storage servers. When you have at least 3 harddisks in a machine.
- 14. Some commands Now we shall continue with some of the hundreds of Linux and Unix commands available to administrators.
- 18. Find locate kfind Find, locate , updatedb and kfind explanation.
- 19. wildcards
- 20. wildcards * multiple characters ? single character $ ending of the line ^ starting of the line
- 21. wildcards $ Matches the ending position of the string or the position just before a string-ending newline. In line-based tools, it matches the ending position of any line.
- 22. wildcards
- 23. wildcards
- 24. wildcards
- 25. wildcards
- 26. wildcards
- 27. wildcards
- 28. wildcards
- 29. wildcards
- 30. wildcards
- 31. wildcards
- 33. Soft and Hard Links Ln and ln -s explanation and demo
- 34. File ownership File Ownership (chown, chgrp)
- 35. Getting Help man, info, google, search engines.
- 36. Tab Completion Demo tab completion.
- 37. Redirection > and >> (done) < | 2> (left to do)