System Commands, OPPE 2

January 2023 term, Set 2

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Question 1

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Write a SED script to print the domain names of email from the standard input.

Note: Domain name in an email address is anything which comes after @. e.g. in [email protected] the @somemail.com is the domain name.

Sample input

Mehta,1-322-248-9102,[email protected],Daman and Diu
Malik,1-335-746-5592,[email protected],Andhra Pradesh
Suri,1-134-516-1754,[email protected],Lakshadweep
Persaud,268-1152,[email protected],Dadra and Nagar Haveli
Joshi,1-869-326-6582,[email protected],OR
Subram,1-172-433-4318,[email protected],MH
Sehgal,647-1701,[email protected],DD

Sample output

yahoo.net
hotmail.com
protonmail.org
aol.co.uk
hotmail.com
hotmail.edu
outlook.co.uk

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#!/usr/bin/sed -f
# Write your sed script here

#!/usr/bin/sed -f # Write your sed script here

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Write a SED script to print the domain names of email from the standard input. Note: Domain name in an email address is anything which comes after `@`. e.g. in `[email protected]` the `@somemail.com` is the domain name. **Sample input** ```bash Mehta,1-322-248-9102,[email protected],Daman and Diu Malik,1-335-746-5592,[email protected],Andhra Pradesh Suri,1-134-516-1754,[email protected],Lakshadweep Persaud,268-1152,[email protected],Dadra and Nagar Haveli Joshi,1-869-326-6582,[email protected],OR Subram,1-172-433-4318,[email protected],MH Sehgal,647-1701,[email protected],DD ``` **Sample output** ```bash yahoo.net hotmail.com protonmail.org aol.co.uk hotmail.com hotmail.edu outlook.co.uk ``` Write a SED script which will print line with all the lines have the `hotmail` domain except the domain `hotmail.com` Note: Domain name in an email address is anything which comes after '@'. e.g. in `[email protected]` the `@somemail.com` is the domain name. **Sample input** ```csv name,phone,email,region Sahni,151-8534,[email protected],KA Mehta,1-322-248-9102,[email protected],Daman and Diu Malik,1-335-746-5592,[email protected],Andhra Pradesh Suri,1-134-516-1754,[email protected],Lakshadweep Persaud,268-1152,[email protected],Dadra and Nagar Haveli Joshi,1-869-326-6582,[email protected],OR Subram,1-172-433-4318,[email protected],MH ``` **Sample output** ```csv Sahni,151-8534,[email protected],KA Subram,1-172-433-4318,[email protected],MH ``` Write a SED script to mask the first 6 digits of the phone numbers with asterisks, such that only last four digits of phone number of ten digits are visible. The phone number could be present anywhere in the text but it will be in the format of continuous ten digits starting with either of 9, 8, 7 and 6. **Sample Input** ```text Yesterday I received a message from 9876543210, it has numerical sequence 1234567890 in it. then soon after I received the same message from 9876543211 as well. Then I called 9876543212 to inquire about it, they gave a reference id AHDISJ12354 and a fallback code 3245112341 as well. ``` **Sample Output** ```text Yesterday I received a message from ******3210, it has numerical sequence 1234567890 in it. then soon after I received the same message from ******3211 as well. Then I called ******3212 to inquire about it, they gave a reference id AHDISJ12354 and a fallback code 3245112341 as well. ```