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Yes it does make sense. Good work!

By the way if there are multiple sessions from same user, you can use sort to get rid of duplicates. Check the sort man pages to understand how to get unique...

I would recommend to use who instead of w because then you don't have to worry about skipping the header lines that is present in w output.

You have to pipe who output to sed, use regular...

Also, you could
$ echo one two three >sample2.txt

$ cat sample2.txt
one two three


However, what you wrote did not say a file but a variable!

Share your thoughts on solving this question? Show us what have you tried so far?

A shell program is simply a collection of commands. And when the commands are put together, the desired result is achieved.

The #1 tells you the variable TEXT and the command to be used tr.
What...

To delete spaces from a file: tr -d ' ' < inputfile > outputfile

To do this to a string in the shell you must use echo and pipes.