1 Linux Introduction

2 Linux is closer to?

3 Linux Operating System

4 Linux Files & Processes

5 Number of processes

6 File Name on restarting

7 Process on Computer Restart

8 Process id

9 The Directory Structure

10 Relative File Names

11 Create Directory

12 Create Directory - nested

13 Delete a file

14 Create File

15 Create Text File Using Nano

16 Copy File

17 Copy a file into another directory

18 Copy a directory into another directory

19 Move Files & Directories

20 Move a file to folder

21 Delete Files & Directories

22 Remove a directory

23 Seeing Inside File - cat, tail, head

24 Commands

25 Commands to print text of a file

26 Commands to print first few lines

27 Use find command

28 Use find command to find files with .txt extension

29 Use grep command

30 Which line did you get in the result?

31 Use wc command

32 Check number of characters in a file

33 Permissions - Overview

34 Permissions: Assignment - Check owner and group of a file

35 Permissions - Using chmod To Change

36 Permissions: Assignment - Owner can change, others can only read

37 Permission: Assignment - Everyone can execute

38 Permission: Assignment - Nobody other than owner can read the file

39 Permission: Assignment - Only Group Members can read

40 Permissions - Numeric

41 Permissions: Numeric representation

42 Permissions - Advanced

43 Who can delete a file

44 Process

45 Which one is a process?

46 Find information about processes

47 Check ps command

48 Check all processes

49 Which command to use to monitor process?

50 Background Processes

51 Send a process in background

52 Kill a background process

53 Interacting with processes

54 More - Interacting with processes

55 Process hierarchy

56 Command to kill a process

57 Writing first shell script

58 Every Program Returns a Value

59 Value of echo $

60 Networking: Sockets and ports

61 Connecting to localhost

62 Files & Directories: linking

63 Files & Directories - Symbolic links

64 Files & Directories - More About Symbolic Link

65 Readlink Command

66 Hard Link to a Directory

67 Chaining Unix Commands

68 Redirecting the output of a program

69 Pipes - Introduction

70 Filters

71 Word Count Exercise

72 Improved Word Count Using Unix Commands

73 Shell script for WordCount

74 Permissions of Processes

75 Read or Modify /etc/shadow

76 Permissions of Processes - setuid

77 Permissions - setting setuid

78 permissions of passwd file

79 Special System commands

80 Command to reboot the machine

81 Where is my program?

82 What is Hadoop command

83 Environment variables

84 Find value of an environment variable

85 Setting Environment variables