NOTE: This question is the complement of this Q&A: How to “grep” for line length in a given range?
How can we grep for lines that have less than 8 or more than 63 characters, none that contain more than eight and less than 63 characters?
So, some acceptable character counts could be…
7 6 5 4 3 2 1 0
…and…
64 65 66 67 ...
Answers:
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Method 1
grep -xv '.{8,63}' <input >output
grep‘s -x switch denotes a whole line match – which is to say that any pattern matched must define a line from head to tail. doing…
grep -x pattern
…is generally equivalent to…
grep ^pattern$
grep‘s -v switch negates a pattern’s influence on line-selection. generally doing…
grep pattern
…will only select lines that match the pattern, but with a -v negated pattern only those lines that don’t match are selected.
…and so…
grep -xv '.{8,63}'
…matches all lines which consist from head to tail of anywhere between 8 and 63 characters, and the -v negated selection causes grep only to print everything else.
All methods was sourced from stackoverflow.com or stackexchange.com, is licensed under cc by-sa 2.5, cc by-sa 3.0 and cc by-sa 4.0