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Full Discussion: Remove files having 0 byte or only header
Top Forums Shell Programming and Scripting Remove files having 0 byte or only header Post 302993949 by Don Cragun on Thursday 16th of March 2017 03:03:37 PM
Old 03-16-2017
Quote:
Originally Posted by jim mcnamara
Okay. You need to describe how to tell a header-only file from a file you want to keep.
If is simply size. Pretend example -

You want to delete 36 byte files and smaller, this finds files smaller than 37 and created in the last 24 hours:

Code:
find /path/to/files -type f -size -37c -ctime -1 -exec rm {} \;

One line files work this way:
Code:
find /path/to/files -type f  -ctime -1 |
while read fname 
do  
       sz=`cat $fname | wc -l`   # Not a UUOC done to get just a line count
       [ $sz -lt 2 ] && rm $fname
done

While it is true that:
Code:
wc -l "$fname"

pollutes the output with an unwanted filename:
Code:
cat $fname | wc -l

is still an unneeded use of cat. Try:
Code:
wc -l < "$fname"

instead.
This User Gave Thanks to Don Cragun For This Post:
jim mcnamara
 

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LEARN ABOUT DEBIAN

update-metainit

UPDATE-METAINIT(1)					User Contributed Perl Documentation					UPDATE-METAINIT(1)

NAME

       update-metainit - Generates init scripts

SYNOPSIS

       update-metainit [--remove initname [--purge] ]

DESCRIPTION

       Metainit solves the problem of writing good init scripts. Instead of manually creating these important files, they are derived from a
       declaritive description in the metainit files in /etc/metainit. These files can be shipped with packages or created by the local adminis-
       trator.

       If update-metainit called without argument, it will regenerate init scripts for all the files in /etc/metainit. The generated files contain
       a large warning in form of a comment that they will be overridden. Modifications are preferably done in the files in /etc/metainit and made
       effective by running update-metainit. If needed, the administrator can prevent modified init files by removing the warning comment.

OPTIONS

       --remove initname
	   This command will remove any generated and non-modified scripts that were created by the metainit file with the name initname.

       --purge
	   Only usable with --remove. Will remove the generated files even if modified.

SEE ALSO

       dh_metainit(1)

AUTHOR

       Joachim Breitner <nomeata@debian.org>

perl v5.8.8							    2007-07-30							UPDATE-METAINIT(1)
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