I would like to search for files that would not match 2 -name conditions. I can do it like so :

find /media/d/ -type f -size +50M ! -name "*deb" ! -name "*vmdk"

and this will yield proper result but can I join these 2 condition with OR somehow ?

  • What would changing the condition between the -name tests actually mean? Well, it would mean that you'd look for files whose names don't end with deb and vmdk at the same time. As far as I know, no filenames can end with two different strings at the same time, so you would find all files (that are above 50 MB in size). (NOT A) OR (NOT B) is the same as NOT(A AND B). – Kusalananda Feb 7 at 12:33

You can do this using a negated -regex, too:-

 find ./ ! -regex  '.*\(deb\|vmdk\)$'
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  • 6
    Note that -regex is less portable than -name. – jw013 Oct 12 '12 at 13:54

yes, you can:

find /media/d/ -type f -size +50M ! \( -name "*deb" -o -name "*vmdk" \)

Explanation from the POSIX spec:

! expression : Negation of a primary; the unary NOT operator.

( expression ): True if expression is true.

expression -o expression: Alternation of primaries; the OR operator. The second expression shall not be evaluated if the first expression is true.

Note that parenthesis, both opening and closing, are prefixed by a backslash (\) to prevent evaluation by the shell.

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  • 6
    If you're doing -exec or any other action on the find results, remember to parenthese \( \) the whole criteria, otherwise -exec will apply only to the last -or-ed criterion. To work on all of them, parenthese them: find \( <criterion> -o <criterion> \) -exec <command> – Victor Sergienko Jun 13 '19 at 20:38

You were close to a solution:

find /media/d/ -type f -size +50M -and ! -name "*deb" -and ! -name "*vmdk"

You can combine the following logic operators in any sequence:

-a   -and      - operator AND
-o   -or       - operator OR
!              - operator NOT
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  • It doesn't look like you've actually changed the effect of the user's find command. Note that -a is the default operator if an explicit operator is missing. Also note that if you use -o, there must be a logical grouping of the two name tests. You do this with \( ... \). – Kusalananda Feb 7 at 12:29

You can use regular expressions as in:

find /media/d -type f -size +50M ! -regex '\(.*deb\|.*vmdk\)'

Backslash is the escape character; . matches a single character, and * serves to match the previous character zero or more times, so .* means match zero or more characters.

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  • 1
    Adding an explanation would make your answer better. – N.N. Oct 12 '12 at 14:01
  • You're right. Added some explanations. – Francesco Turco Oct 12 '12 at 14:09

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