Time Sensitive Shell Scripting File1 can hold any content b

(Time Sensitive)

Shell Scripting [ File1 can hold any content, but cannot have an extension eg .txt]

Select the lines from file file1 that have exactly three characters in them.

Select the lines from file file1 that have at least three characters in them.

Select the lines from file file1 that have three or less characters in them

Select the non-blank lines from the file file1.

Select the lines from file file1 that start with a capital letter.

Select the lines from file file1 that end with a period.

Select the lines from file file1 that have the string unix.

Select the lines from file file1 that end with the string unix.

Select the lines from file file1 that have only the string unix.

Select the lines from file file1 that have the pattern unix at least two times.

Select the lines from file file1 that have the pattern unix and ends with unix.

Copy file file1 on the screen, but delete the blank lines.

Select the lines from file file1 that have a digit.

Select the lines from file file1 that have at least two digits without any other characters in between.

Solution

Assume the content in file1 is as mentioned below:

Asdfasfgsdf
sfdvfbdfhdh
as
Cv
ssdk.
dgsefg
Jsdsdfsfb

Defbsgb
sfndfhndfhb
afvafbaeg!
Jsdsdfsf

ggg
wer

1. Select lines from file file1 that have exactly 3 characters

awk \'{if(length($0) == 3) print}\' file1

2. Select lines from file file1 that have at least 3 characters

awk \'{if(length($0) >= 3) print}\' file1

3. Select lines from file file1 that have 3 or less characters

awk \'{if(length($0) <= 3) print}\' file1

4. select non-blank lines from the file file1

awk \'{if(length($0) > 0) print}\' file1

5. Select lines from file file1 starts with capital letter

grep -o \"^[A-Z]\\w*\" file1

6. Select lines from file file1 ends with a period

grep -o \"\\w*[\\.\\!\\?]$\" file1

7. Select the lines from file file1 that have the string unix

grep -o \"\\w*unix\\w*\" file1

8. Select the lines from file file1 that end with the string unix.

grep -o \"\\w*unix$\" file1

9. Select the lines from file file1 that have only the string unix.

grep -o \"^unix$\" file1

10. Select the lines from file file1 that have the pattern unix at least two times.

grep -o \"\\w*unix\\w*unix\\w*\" file1

11. Select the lines from file file1 that have the pattern unix and ends with unix.

grep -o \"\\w*unix\\w*unix$\" file1

12. Copy file file1 on the screen, but delete the blank lines.

awk \'{if(length($0) > 0) print}\' file1 | cat

13. Select the lines from file file1 that have a digit.

grep -o \"\\w*\\d\\w*\" file1

14. Select the lines from file file1 that have at least two digits without any other characters in between

grep -o \"\\w*\\d\\d\\w*\" file1