Say I have a list of the following files in my current dir:
lab1.jav mytst2 pie.c prog2.c tst3.ex tst5:5.tlab2jav lab2jav.ext new.c prog1.c tst1 tst4.exc tst6:6123.tA7-tst.c fred.txt
And I need to list the files with a total of say 7 letters for example. How would you do this? I tried to no avail:
ls | egrep -i '[a-z]{7}'
I think it's because the dots are in the way, is there a simple way of doing this?
It can be done this way:
ls | grep -E '^(\W*[0-9]*[a-zA-Z]){7}\W*[0-9]*$'
This includes cases when the first and the last character is a digit or a non alphanumeric char.
Or shorter
ls | grep -Ei '^([^a-z]*[a-z]){7}[^a-z]*$'
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