Grep Command

Articles

http://www.thegeekstuff.com/2009/03/15-practical-unix-grep-command-examples/

https://www.cyberciti.biz/faq/howto-use-grep-command-in-linux-unix/

https://www.tutorialspoint.com/unix_commands/grep.htm

https://www.techonthenet.com/linux/commands/grep.php

https://www.computerhope.com/unix/ugrep.htm

Web Services Interview Questions

Articles

http://www.softwaretestinghelp.com/web-services-interview-questions/

Page Object Model (Python)

Articles

https://qxf2.com/blog/page-object-model-selenium-python/

Tar Command

Articles

https://www.tutorialspoint.com/unix_commands/tar.htm

http://www.thegeekstuff.com/2010/04/unix-tar-command-examples

https://www.computerhope.com/unix/utar.htm

https://www.howtogeek.com/248780/how-to-compress-and-extract-files-using-the-tar-command-on-linux/

https://www.tecmint.com/18-tar-command-examples-in-linux/

Videos

https://www.youtube.com/watch?v=yR0r_3svzUU

SQL - Interview Questions

Articles

http://www.softwaretestinghelp.com/50-popular-sql-interview-questions-for-testers/

http://www.softwaretestinghelp.com/31-best-database-testing-interview-questions-and-answers-for-qa-testers/

https://www.guru99.com/database-testing-interview-questions.html

http://www.gcreddy.com/2014/07/sql-interview-questions-and-answers.html

http://www.java67.com/2013/04/10-frequently-asked-sql-query-interview-questions-answers-database.html

RIGHT Join

Articles

https://www.tutorialspoint.com/sql/sql-right-joins.htm

https://www.javatpoint.com/sql-right-join

https://www.tutorialrepublic.com/sql-tutorial/sql-right-join-operation.php

https://www.w3schools.com/sql/sql_join_right.asp

Videos

https://www.youtube.com/watch?v=I2vuxWebeH8

https://www.youtube.com/watch?v=pBO_VCbFc0E

https://www.youtube.com/watch?v=minhEklDcUI

DDL, DML and DCL

http://www.w3schools.in/mysql/ddl-dml-dcl/

http://www.tech-recipes.com/rx/55356/dml-ddl-dcl-and-tcl-statements-in-sql-with-examples/