Commands using file (166)
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Create a bunch of random files with random binary content. Basically dd dumps randomly from your hard disk to files random-file*. Show Sample Output
0no_of_files=10; counter=1; while [[ $counter -le $no_of_files ]]; do echo Creating file no $counter; dd bs=1024 count=$RANDOM skip=$RANDOM if=/dev/sda of=random-file.$counter; let "counter += 1"; done -
get files without extensions, get ASCII and utf-8 as "text/plain" Show Sample Output
0file -i * | grep 'text/plain' | wc -l -
"&&" runs sed if and only if the backup completed and /bin/cp exited cleanly. Works for multiple files; just specify multiple filenames (or glob). Use -v switch for cp to play it safe.
0for file in <filename>; do cp $file{,.bak} && sed 's/old/new/g' $file.bak > $file; done -
List all text files in the current directory.
0find . | xargs file | grep ".*: .* text" | sed "s;\(.*\): .* text.*;\1;" -
cat -n file : number all line cat -b file : number only non empty line see man cat
0cat -n file or cat -b file -
I know this has been beaten to death but finding video files using mime types and printing the "hours of video" for each directory is (IMHO) easier to parse than just a single total. Output is in minutes. Among the other niceties is that it omits printing of non-video files/folders PS: Barely managed to fit it within the 255 character limit :D Show Sample Output
0for item in *;do echo -n "$item - ";find "$item" -type f -print0 | xargs -0 file -iNf - | grep video | cut -d: -f1 | xargs -d'\n' /usr/share/doc/mplayer/examples/midentify | grep ID_LENGTH | awk -F= '{sum+=$2} END {print(sum/60)}'; done | grep -v ' - 0$' -
Finds all (not just adjacent) repeated lines in a file. Show Sample Output
0LC_ALL=C sort file | uniq -c | sort -n -k1 -r -
0for file in `ls *.png`; do convert -trim $file $file; done
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0for file in *.png; do mogrify -trim "$file"; done
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0rmall_but() { declare -A keep;for arg;do keep[${arg%/}]=1;done;for file in *;do [[ ${keep[$file]} ]] || rm -rf "$file";done; }
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If you used to do `vlc /tmp/Flash*`, but no longer can't, this is for you.
0find -L /proc/`ps aux | grep [f]lash | awk '{print $2}'`/fd/ | xargs file -L | grep Video | awk '{sub(/:/, ""); print $1}' | xargs vlc -
If you make a mess (like I did) and you removed all the executable permissions of a directory (or you set executable permissions to everything) this can help. It supports spaces and other special characters in the file paths, but it will work only in bash, GNU find and GNU egrep. You can complement it with these two commands: 1. add executable permission to directories:
find . type d -print0 | xargs -0 chmod +x2. and remove to files:find . type d -print0 | xargs -0 chmod -xOr, in the same loop:while IFS= read -r -u3 -d $'\0' file; docase $(file "$file" | cut -f 2- -d :) in:*executable*|*ELF*|*directory*)chmod +x "$file";;*)chmod -x "$file";;esac || breakdone 3< <(find . -print0)Ideas stolen from Greg's wiki: http://mywiki.wooledge.org/BashFAQ/0200while IFS= read -r -u3 -d $'\0' file; do file "$file" | egrep -q 'executable|ELF' && chmod +x "$file"; done 3< <(find . -type f -print0) -
Rename all mp4 files with crc32 information. Show Sample Output
0for file in *.mp4; do mv "$file" "${file%.*} [$(cksfv -b -q "$file" | egrep -o "\b[A-F0-9]{8}\b$")].${file#*.}"; done -
0ls -1 $PATH*/* | xargs file | awk -F":" '!($2~/PDF document/){print $1}' |xargs rm -rf
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You need: pxz for the actual work (http://jnovy.fedorapeople.org/pxz/). The function could be better with better multifile and stdin/out support.
0function xzv() { THREADS=`grep processor /proc/cpuinfo | wc -l`; for file in $*; do pv -s `stat -c%s $file` < $file | pxz -q -T $THREADS > $file.xz ; done; } -
0(sed 's/^/x*=/' file ; echo x) | bc
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0cvs -q diff --brief | grep file | cut -d/ -f3- | cut -d',' -f1
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Helps to fix permissions when a user clobbers them in their home directory or elsewhere. Does not rely on file extension, but uses the `file` command for context.
0find . -type f ! -perm /u+x -printf "\"%p\"\n" | xargs file | grep -i executable -
Converts flac files to mp3 with the same file names in the same directory. Show Sample Output
0for file in *.flac; do flac -cd "$file" | lame -h -b 320 - "${file%.flac}.mp3"; done -
All files in the directory will be renamed replacing every space in the filename by "_" (underline) and converting upper case characters to lower case characters. e.g. Foo Bar.txt --> foo_bar.txt
0for file in * ; do mv "$file" `echo "$file" | tr ' ' '_' | tr '[A-Z]' '[a-z]'`; done -
0vlc $(for f in /proc/$(pgrep -f libflashplayer.so |head -n 1)/fd/*; do ;if $(file ${f} |grep -q "broken symbolic link to \`/tmp/FlashXX"); then echo ${f};fi;done)
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Allows to change 'shell' compatible files execution bit even if their name is not *.sh
0find . -type f -exec file '{}' + | grep shell | awk -F':' '{print $1}' | xargs chmod u+x -
0sudo file -bs /dev/sda | sed -e 's/.*partition 1\(.*\) code offset.*/partition 1\1/g' -e 's/\(.\);/\1\n/g'
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touch -t 201208211200 first ; touch -t 201208220100 last ; creates 2 files: first & last, with timestamps that the find command should look between: 201208211200 = 2012-08-21 12:00 201208220100 = 2012-08-22 01:00 then we run find command with "-newer" switch, that finds by comparing timestamp against a reference file: find /path/to/files/ -newer first ! -newer last meaning: find any files in /path/to/files that are newer than file "first" and not newer than file "last" pipe the output of this find command through xargs to a move command: | xargs -ifile mv -fv file /path/to/destination/ and finally, remove the reference files we created for this operation: rm first; rm last;
0touch -t 201208211200 first ; touch -t 201208220100 last ; find /path/to/files/ -newer first ! -newer last | xargs -ifile mv -fv file /path/to/destination/ ; rm first; rm last; -
0for file in `svn st | awk '{print $2}'`; do svn revert $file; done
- ‹ First < 2 3 4 5 6 > Last ›
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