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Find file dont have that string

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Top Forums UNIX for Beginners Questions & Answers Find file dont have that string
# 1  
Old 04-11-2019
Quote:
Originally Posted by MadeInGermany
Don, the difference is with empty files and multi-line files:
Code:
$ printf "a\n" > a1
$ printf "b\n" > b1
$ printf "a\nb\n" > ab2
$ printf "" > e0
$ grep -FL "a" a1 b1 ab2 e0
b1
e0
$ grep -Flv "a" a1 b1 ab2 e0
b1
ab2

Only the one-line files a1 and b1 behave the same.
Yes. I apologize for being vague. What I should have said was:

The grep -Flv "a" ... will list a file operand if that file contains one or more lines that do not contain "a".

The grep -FL "a" ... will list a file operand if that file does not contain any lines that contain "a".

No matter what pattern you are searching for, grep -FL pattern file... will always list every file operand that names an empty file and grep -Flv pattern file... will never list any file operand that names an empty file.
These 2 Users Gave Thanks to Don Cragun For This Post:
MadeInGermany rbatte1
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