09-21-2015
How can you write the command using egrep without the -v option? With great difficulty. All you have to do is create an ERE that matches any line that does not match any line that contains something like CAT, MAT, or DAT. How you define "something like" may make a huge difference between this being difficult or impossible.
If this isn't a homework assignment (which would need to be filed in the Homework and Coursework Questions forum instead of the Shell Programming and Scripting forum), why would you need to avoid the egrep -v option?
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