Shell Scripting

 

1. Basic Information
2. Check Shells
3. Sample Hello Script (Echo Commands Options)
4. re-direct to output into file
5. creating file and adding the data while executing script
6. adding new data instead of replacing
7. Comments
8. quotes
9. HereDOC -- What ever we are going to write in scrpit: it will visible on output
10. Script Inputs ( Arguments, Read, STDIN)
11. Script Outputs (STDOUT , STDERR)
12. Variables
13. Command Arguments
14. Example Script1 ( Echo, variables, arguments)
15. Ex : Create no of files
16. Ex: Send output from one script to another script
17. Arithmetic Operators
18. File Operators for finding (-f, -d, -s, -w, -r, -x)
19. Ex: Numeric and Athematic Operations : Arithmetic Operations
20. Ex: Numeric and Athematic Operations: converting-list-of-hexadecimal-numbers
21. Test Commands (integral part of the conditional statements)
22. Functions
23. Conditional Statements (IF, if-else, if-else-if, case)
24. Loop Statements (For, While, Until)
25. Conditional Statements (Example)
26. Conditional / Loop Examples
27. Loop Statement Ex: Get all test files size and Move 0KB files into separate folder
28. Break & Continue statements
29. String Processing - comparing strings
30. String Processing - Comparing Length of strings
31. String Processing - String concatenation
32. String Processing - script for upper and lower cases
33. Grep(global regular expression print) : Search string in the File : Example 1
34. Grep : Search string in the File from given path : Example 2
35. Grep : Case Sensitive (-i)
36. Grep : Case sensitive & For Line Numbers (-n)
37. Grep : count of lines which is contains the given text (-c)
38. Grep : count of lines which is not contains the given text(-v)
39. Grep : Display's the lines after the results( -A, -B, -C)
40. AWK : print a file
41. AWK : search for a specific pattern using ‘awk’
42. AWK : extract the content from the lines, where the program found its targeted word.($1, $2)
43. AWK : To print the first item along with the row number(NR) separated with ” – “ from each line
44. AWK : To print any non empty line if present
45. AWK: To print the squares of first numbers from 1 to n say 6:
46. AWK: To find/check for any string in any specific column:
47. AWK: Printing lines with less than 20 characters:  
48. AWK: To find the length of the longest line present in the file:
49. SED - Stream editor - Changing one letter --> 's/i/I/'
50. SED - Changing all letters --> 's/i/I/g' --> Global Replacement
51. SED - Substitute word
52. SED - Case Sensitive (-i)
53. SED - Removing lines /d
54. SED - Displaying multiple consecutive lines--------->>sed -n '1p' <filename>
55. SED - Reading Commands From another File--------->>sed -f <sed file> <file name> 
56. SED - Replacing words in selective lines->> '1,3s/word/relaceword/'
57. SED - Replacing selective occurrence (sed 's/unix/25555/4i' $fileName )
58. SED - Printing lines that contain a particular word (sed -n '/WIndows/p')
59. SED - Transformation of Characters----------->>>'y/abc/123/'
60. SED - To delete any blank records- awk -F " " '{print $4}' | sed '/^$/d'
61. SED All Commands

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Some More Example Scripts

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1. Test File existence
2. Check if User is Root
3. Print Number of Files and Folders in given directory
4. Find Duplicate files by name
5. Find Duplicate lines and Count for all files in the directory
6. Lines count $ words count of all files in given directory
7. Get Databases & tables List 
8. create new database from existing database and extract all tables from old DB to new DB
9. Get all tables record count from Old DB & New DB
10. Record Count Script with Alert Message
11. Find Greater number from given 5 numbers(else-if)
12. Get file size for all tables and moving 0KB files to another folder
13. Print Chess board
14. Difference of 2 files
15. Difference of all files 
16. Interview Ques: Printing Custom rows and columns (By using AWK)
17. Interview Ques: Convert Row values Positive to Negative
18. Interview Ques: Convert Column values Positive to Negative