In this way it doesn't have problems with filenames with spaces.

Returns any file in the folder which would be rejected by Gmail, if you were to send zipped version.

(Yes, you could just zip it and knock the extension off and put it back on the other side, but for some people this just isn't a solution)

Increase the modification date for the files selected with the find command.

Greater than 500M and sorted by size.

you can change the size :)

Some MP3s come with tags that don't work with all players. Also, some good tag editors like, EasyTAG output tags that don't work with all players. For example, EasyTAG saves the genre as a numeric field, which is not used correctly in Sansa MP3 players.

This command corrects the ID3 tags in MP3 files using mid3iconv, which comes with mutagen. To install Mutagen on Fedora use "yum install python-mutagen"

This command is recursive and will delete in all directories in ".". It will find and delete all files not specified with ! -name "pattern". In this case it's file extensions. -type f means it will only find files and not directories. Finally the -delete flag ask find to delete what it matches. You can test the command by running it first without delete and it will list the files it will delete when you run it.

Preserve file structure when coping and exclude some file o dir patterns

Search in all html files and remove the lines that 'String' is found.

This deals nicely with filenames containing special characters and can deal with more files than can fit on a commandline. It also avoids spawning du.

recursive find and replace. important stuff are grep -Z and zargs -0 which add zero byte after file name so sed can work even with file names with spaces.

Looking for carriage returns would also identify files with legacy mac line endings. To fix both types:

find . -type f -iname '*.flac' # searches from the current folder recursively for .flac audio files

| # the output (a .flac audio files with relative path from ./ ) is piped to

while read FILE; do FILENAME="${FILE%.*}"; flac -cd "$FILE" | lame -b 192 - "${FILENAME}.mp3"; done

# for each line on the list:

# FILE gets the file with .flac extension and relative path

# FILENAME gets FILE without the .flac extension

# run flac for that FILE with output piped to lame conversion to mp3 using 192Kb bitrate

If you would like to ignore a directory including its subdirectory. For example, a tmp/ directory

All with only one pipe. Should be much faster as well (sort is slow). Use find instead of ls for recursion or reliability.

Edit: case insensitive

If your grep doesn't have an -o option, you can use sed instead.

Just a little simplification.

This is a command template for achiving the following:

* loop over files --> find -name "" | while read file; do ...; done

* output progress --> echo -n .

* execute some command on each file and save output for later usage --> output=$()

* if command failed, open subshell and echo newline --> || (echo;...;...;)

* echo output of command --> echo "$output"