This document provides an overview of network management with Linux. It discusses key topics such as: - Why Linux is significant, including its growing popularity, power, ability to run on multiple hardware platforms, and speed and stability. - The basic Linux system structure including user commands, the shell for interpreting commands, and the kernel for managing hardware resources. - Common shells like Bash used for calling commands and programming. - Basic Linux file system organization with directories, pathnames, and special filenames. - File permissions including read, write, and execute permissions for owners, groups and others. - Virtual file systems and how they provide a consistent view of data storage. - User management with tools like useradd

1. Network Management with Linux Prateek Porwal Computer Science & Engg. Deptt. Mail ID: prateek.porwal@yahoo.in

2. Red Hat Linux….

5. Powerful

6. Runs on multiple hardware platforms

7. Users like its speed and stability

8. No requirement for latest hardware

9. It’s “free”

10. Licensed under GPL

13. Used to call commands and programs

14. An interpreter

15. Powerful programming language

16. “Shell scripts” = .bat .cmd EXEC REXX

18. Data files are stored in directories (folders)

20. naming each containing directory

21. starting at the root

22. This is known as the pathname/ etc home usr passwd inittab /etc/passwd apple mango banana a b /home/apple/b Naming Files

24. / The root directory (not to be confused with the root user)

25. . The current directory

26. .. The parent (previous) directory

27. ~ My home directory

28. Examples:

29. ./a same as a

31. Has a uid (login name), gid (login group) and membership of a "groups" list:

32. The uid is who you are (name and number)

33. The gid is your initial “login group” you normally belong to

35. Read - users with read permission may read the file or list the directory

36. Write - users with write permission may write to the file or new files to the directory

38. Interpreting File Permissions -rwxrwxrwx Other permissions Group permissions Owner permissions Directory flag (d=directory; l=link)

40. Most commonly, ext2fs

41. Filenames of 255 characters

42. File sizes up to 2GB

43. Theoretical limit 4TB

44. Derived from extfs

46. Almost all hardware devices are represented using a generic interface.

50. passwd will allow to change the password.

51. Of course there are lot of GUI tools for all these user management.

52. Group all common user to single group.

53. Be careful while editing /etc/passwd

56. TELNET is an old application & has widespread interoperability.

58. You can use any commands that are available on the remote system that you are attached to.

61. FTP allows you to upload and download files between local and remote hosts.

62. The general form of the FTP command is FTP [ IP_address | host_name].

65. Technical Differences

67. Linux vs. Windows

68. Technical Differences

70. End-User Differences

72. Thanks….