UNIX for Dummies Questions & Answers

Since you have been a member of this forum for more than three years, the "new to UNIX" tag doesn't really hold up very well.
So why didn't you tell us in your 1st message in this thread what your requirements were, and then ask us if the command would do what you wanted?

Showing us a command with no indication of what you're trying to do makes it appear that you found that command line somewhere and were asking us what it does because you were too lazy to look at the man page!
You have been a member of this forum for more than 3 years. Log in once in a while and look at the questions others have raised. Look at the responses they have gotten. Look at the man pages for the commands used to figure out how they work. Copy the input files to your system, copy the code suggestions to your system, look at the output they produce. Play with the code, make changes, see how it affects the output, ... If you can't figure out how someone's code works after reading the man pages, ask questions.

Read the man pages for ksh or bash, find, ls, grep, vi, sed, and awk. Dream about how you could make use of the features described on the man pages for those tools. Make up problems to solve and then try to solve them using the tools you have just read about.

When you ask questions, always tell us what OS and shell you're using. Although many common utilities behave the same way on most systems, most implementations provide extensions that aren't available on other systems. Always providing this information makes it easier for all of the people who volunteer their time here to help you get what you need more quickly.