Commands using file sorted by votes

Commands using file (166)

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Cat files in a directory; for loop command

Original submitted version would break if any filenames had whitespaces in them. The command is a Bad Idea anyhow, because you will end up `cat`ing a binary or something else specacularly bad.
This is sample output - yours may be different.
-2

for file in ./*; do cat "$file"; sleep 0.3

DopeGhoti · 2011-11-28 20:10:57 3
Write in a text file the contents of all the zip files in a directory.

It can be used to create an index of a backup directory or to find some file.
This is sample output - yours may be different.
-2

for file in *.zip; do unzip -l "$file" >> archiveindex.txt ; done;

chon8a · 2013-05-02 01:43:26 7
Reset the last modified time for each file in a git repo to its last commit time
This is sample output - yours may be different.
-2

for file in $( git ls-files ); do echo $file; touch -t $(git --no-pager log --date=local -1 --format="%ct" $file | php -r 'echo @date( "YmdHi.s", trim( file_get_contents( "php://stdin" ) ) );') $file; done

westonruter · 2015-07-01 00:28:06 13
stores the number of lines of "file" in a variable to use in a loop
This is sample output - yours may be different.
-3

count=`wc -l file | cut -d ' ' -f1`

vmplacco · 2009-02-25 21:21:47 5
convert all WAVs from any format (MS ADPCM) to PCM

I needed this for wine.
This is sample output - yours may be different.
-3

for file in $(find -type f -iname "*wav"); do mv $file "$file"_orig.WAV; mplayer -ao pcm "$file"_orig.WAV -ao pcm:file=$file; done

oernii · 2009-04-06 21:36:04 6
determine if a shared library is compiled as 32bit or 64bit

file displays a files type the -L flag means follow sym-links (as libraries are often sym-linked to another this behavior is likely preferred) more complex behavior (*two* grep commands!) could be used to determine if the file is or is not a shared library.
This is sample output - yours may be different.
-3

file -L <library> | grep -q '64-bit' && echo 'library is 64 bit' || echo 'library is 32 bit'

infinull · 2010-03-07 06:31:35 3
Recursive and alphabetical orderly cp
This is sample output - yours may be different.
-3

for file in `find *| sort -n | sed 's% %?%g'`; do echo "${file//?/ }"; cp --parents "${file//?/ }" /destinity_folder/ ;done

juanmi · 2011-05-23 16:34:08 7
Remove blank lines from a file and save output to new file
This is sample output - yours may be different.
-4

sed '/^$/d' file >newfile

haplo · 2009-09-24 19:22:49 5
download file1 file2 file3 file4 .... file 100

With counter format [001, 002, ..., 999] , nice with pictures or wallpapers collections.
This is sample output - yours may be different.
-4

for file in $(seq -f '%03.f' 1 $TOTAL ); do echo "($file/$TOTAL)"; curl -f -O http://domain.com/Name_$file.ext; done

nordri · 2010-01-12 15:23:44 6
a find and replace within text-based files, for batch text replacement, not using perl
This is sample output - yours may be different.
-5

for file in `find . -iname "FILENAME"`; do cat $file | sed "s/SEARCH_STRING/REPLACE_STRING/" > $file.tmp; mv $file.tmp $file; done

unixmonkey6754 · 2010-02-24 13:46:29 3
Numerate files, rename files in a directory by incremental number

Renames files in a directory to incremental numbers, following alphabetic order. The command does not maintain extensions.
This is sample output - yours may be different.
-5

declare -i i; i=0; for file in *; do i=`expr $i+1`; mv "$file" $i; done;

themiurgo · 2010-08-26 12:24:38 5
Numerate files, rename files in a directory by incremental number
This is sample output - yours may be different.
-5

declare -i i=0 ; for file in * ; do i=$[$i+1] ; mv "$file" $i; done

pepin · 2010-08-26 12:40:58 3
list with full path
This is sample output - yours may be different.
-6

for file in *; do echo $PWD/$file; done

Velenux · 2011-12-16 13:12:00 4
remove all dead symbolic links in a directory
This is sample output - yours may be different.
-8

for i in $(file * | grep broken | cut -d : -f 1); do rm $i; done

Znuff · 2010-11-02 16:10:42 10
list with full path

Also lists hidden files, current dir and topdir.
This is sample output - yours may be different.
-8

for file in * .*; do echo $PWD/$file; done

marek158 · 2011-12-16 13:42:07 3
Find broken symlinks
This is sample output - yours may be different.
-9

find . -type l | xargs file | grep broken

kineticrick · 2011-04-07 22:58:02 4
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Scale,Rotate, brightness, contrast,...with Image Magick

$rotate: the rotate angle $width, $height: width and height to scale to $birghtness: change brighness

Print all the lines between 10 and 20 of a file

Similarly, if you want to print from 10 to the end of line you can use: sed -n '10,$p' filename This is especially useful if you are dealing with a large file. Sometimes you just want to extract a sample without opening the entire file. Credit goes to wbx & robert at the comments section of http://www.commandlinefu.com/commands/view/348/get-line1000-from-text.#comment

SVN script for automatically adding and deleting files

Print a list of installed Perl modules

Works only if modules are installed "the right way"

Find the package that installed a command

Display any tcp connections to apache

Sometimes apache will get stuck in an established state where you can't get a list of the connecting IP's from mod_status... not a good thing when you need to ban an abusive ip.

Show drive names next to their full serial number (and disk info)

'hpc' in the box - starts a maximum of n compute commands modulo n controlled in parallel

the block of the loop is useful whenever you have huge junks of similar jobs, e.g., convert high res images to thumbnails, and make usage out of all the SMP power on your compute box without flooding the system. note: c is used as counter and the random sleep $ r=`echo $RANDOM%5 |bc`; echo "sleep $r"; sleep $r is just used as a dummy command.

Download certificate chain from FTP

Find all files of a type and copy them elsewhere while keeping intact their full directory structure using find and cpio

.flac is the filetype. /Volumes/Music/FLAC is the destination.

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Commands using file (166)

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