Write a command line that uses only ls and grep to list all files in your...
Write a command line that uses only ls and grep to list all files in your current directory whose names consist of three letters (lowercase or uppercase) followed by an arbitrary number of digits (zero digits is possible)
Homework Answers
ls -l | grep -i ( [a-z]{3}[0-9]* )
ls -l lists all files in your current directory.
-i used in grep command ignores case.
[a-z]{3} gives three letters
[0-9]* contains zero or any number of digits.
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