Commands using file (166)
-
Ever gone to a site that has an MP3 embedded into a pesky flash player, but no download link? Well, this one-liner will yank the names of those tunes straight out of FF's cache in a nice, easy to read list. What you do with them after that is *ahem* no concern of mine. ;) Show Sample Output
4for i in `ls ~/.mozilla/firefox/*/Cache`; do file $i | grep -i mpeg | awk '{print $1}' | sed s/.$//; done -
Notes: 1) -n-1 means sort key is the last field 2) -l is important if each separate record is on a new line (usually so for text files) 3) -j tells msort not to create log file (msort.log) in the working directory 4) may need to install msort package. 5) msort does lot more. Check man msort Show Sample Output
4file /bin/* | msort -j -l -n-1 -n2 2> /dev/null -
Should be a bit more portable since echo -e/n and date's -Ins are not. Show Sample Output
4tail -f file | while read line; do printf "$(date -u '+%F %T%z')\t$line\n"; done -
When working with jailed environments you need to copy all the shared libraries to your jail environment. This is done by running ldd on a binary which needs to run inside the jail. This command will use the output from ldd to automatically copy the shared libraries to a folder of your choice. Show Sample Output
4ldd file | grep "=> /" | awk '{print $3}' | xargs -I '{}' cp -v '{}' /destination -
Without the bashisms and unnecessary sed dependency. Substitutions quoted so that filenames with whitespace will be handled correctly.
4for file in *.pdf; do convert -verbose -colorspace RGB -resize 800 -interlace none -density 300 -quality 80 "$file" "${file//.pdf/.jpg}"; done -
Using bash parameters expansion
4for file in *.txt; do mv "${file%.txt}{.txt,.xml}"; done -
You set the file/dirname transfer variable, in the end point you set the path destination, this command uses pipe view to show progress, compress the file outut and takes account to change the ssh cipher. Support dirnames with spaces. Merged ideas and comments by http://www.commandlinefu.com/commands/view/4379/copy-working-directory-and-compress-it-on-the-fly-while-showing-progress and http://www.commandlinefu.com/commands/view/3177/move-a-lot-of-files-over-ssh Show Sample Output
3file='path to file'; tar -cf - "$file" | pv -s $(du -sb "$file" | awk '{print $1}') | gzip -c | ssh -c blowfish user@host tar -zxf - -C /opt/games -
3for file in *.7z; do 7zr e "$file"; done
-
3tail -f file |xargs -IX printf "$(date -u)\t%s\n" X
-
does the -i option open a tmp file? this method does not.
3sedi(){ case $# in [01]|[3-9])echo usage: sedi sed-cmds file ;;2)sed -a ''"$1"';H;$!d;g;' $2 |sed -a '/^$/d;w '"$2"'' ;;esac;} -
When I go to change a configuration file I always like to make a backup first. You can use "cp -p" to preserve the modification time, but it gets confusing to have file.prev, file.prev2, etc. So I like to add a YYMMDD suffix that shows when the file was last changed. "stat -c %Y" gives you the modification time in epoch seconds, then "date -d @" converts that to whatever format you specify in your "+format" string. Show Sample Output
3cp file file.$(date -d @$(stat -c '%Y' file) "+%y%m%d") -
If your `date` command has `-r` option, you don't need `stat`
3cp file{,.$(date -r file "+%y%m%d")} -
`split -b 1k file` splits files into 1k chunks. Rejoin them with `cat x* > file`.
2split -b 1k file ; cat x* > file -
If you use newsgroups then you'll have come across split files before. Joining together a whole batch of them can be a pain so this will do the whole folder in one. Show Sample Output
2for file in *.001; do NAME=`echo $file | cut -d. -f1,2`; cat "$NAME."[0-9][0-9][0-9] > "$NAME"; done -
This command gives you the charset of a text file, which would be handy if you have no idea of the encoding. Show Sample Output
2file -i <textfile> -
2for file in *.iso; do mkdir `basename $file | awk -F. '{print $1}'`; sudo mount -t iso9660 -o loop $file `basename $file | awk -F. '{print $1}'`; done
-
make sure that flac and lame are installed sudo apt-get install lame flac
2for file in *.flac; do $(flac -cd "$file" | lame -h - "${file%.flac}.mp3"); done -
Grab a list of MP3s (with full path) out of Firefox's cache Ever gone to a site that has an MP3 embedded into a pesky flash player, but no download link? Well, this one-liner will yank the *full path* of those tunes straight out of FF's cache in a clean list. Shorter and Intuitive version of the command submitted by (TuxOtaku) Show Sample Output
2find ~/.mozilla/firefox/*/Cache -exec file {} \; | awk -F ': ' 'tolower($2)~/mpeg/{print $1}' -
This will search all directories and ignore the CVS ones. Then it will search all files in the resulting directories and act on them.
2for dir in $(find -type d ! -name CVS); do for file in $(find $dir -maxdepth 1 -type f); do rm $file; cvs delete $file; done; done -
2grep -Eo \([0-9]\{1,3\}[\.]\)\{3\}[0-9] file | sort | uniq
-
count the times a domain appears on a file which lines are URLs in the form http://domain/resource. Show Sample Output
2cut -d'/' -f3 file | sort | uniq -c -
This command will download $file via server. I've used this when FTP was broken at the office and I needed to download some software packages.
2file=ftp://ftp.gimp.org/pub/gimp/v2.6/gimp-2.6.10.tar.bz2; ssh server "wget $file -O -" > $PWD/${file##*/} -
usage examples ls largedir |rd lynx -dump largewebsite.com |rd rd < largelogfile
2rd(){ while read a ;do printf "$a\n";sleep ${1-1};done ;} # usage: rd < file ; or ... | rd -
Uses the command ts in order to add a timestamp on each line. This command is provided in the moreutils package on Debian, and you may need libtime-duration-perl to be able to format the date.
2tail -f file | ts '%H:%M:%.S' -
This command find which of your zip (or jar) files (when you have lots of them) contains a file you're searching for. It's useful when you have a lot of zip (or jar) files and need to know in which of them the file is archived. It's most common with .jar files when you have to know which of the .jar files contains the java class you need. To find in jar files, you must change "zip" to "jar" in the "find" command. The [internal file name] must be changed to the file name you're searching that is archived into one of the zip/jar files. Before run this command you must step into the directory that contains the zip or jar files.
2find . -iname '*.zip' | while read file; do unzip -l "$file" | grep -q [internal file name] && echo $file; done - < 1 2 3 4 > Last ›
What's this?
commandlinefu.com is the place to record those command-line gems that you return to again and again. That way others can gain from your CLI wisdom and you from theirs too. All commands can be commented on, discussed and voted up or down.
Check These Out
Stay in the loop…
- Follow the Tweets.
-
Every new command is wrapped in a tweet and posted to Twitter. Following the stream is a great way of staying abreast of the latest commands. For the more discerning, there are Twitter accounts for commands that get a minimum of 3 and 10 votes - that way only the great commands get tweeted.
» http://twitter.com/commandlinefu
» http://twitter.com/commandlinefu3
» http://twitter.com/commandlinefu10 - Subscribe to the feeds.
-
Use your favourite RSS aggregator to stay in touch with the latest commands. There are feeds mirroring the 3 Twitter streams as well as for virtually every other subset (users, tags, functions,…):
Subscribe to the feed for:
- » all commands
- » commands with 3 up-votes (commandlinefu3)
- » commands with 10 up-votes (commandlinefu10)
- » commands using file