Commands using file

Not as far off as you thought, now is it?

-mac fanboy

This command gives you the charset of a text file, which would be handy if you have no idea of the encoding.

Next time you see a mac fanboy bragging about 64-bitness of 10.6 give him this so he might sh?

"&&" 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.

get files without extensions, get ASCII and utf-8 as "text/plain"

This will mv all your mp3 files in the current directory to $ARTIST/$ALBUM/$NAME.mp3

Make sure not to use sudo - as some weird things can happen if the mp3 file doesn't have id3 tags.

Create a bunch of random files with random binary content. Basically dd dumps randomly from your hard disk to files random-file*.

The command `cat file >> file` failes with the following error message:

cat: file: input file is output file

`tee` is a nice workaround without using any temporary files.

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.

Say you want to execute 'file' on the command 'top' (to determine what type of file it is); but you don't know where 'top' resides: preface the argument with = and zsh will implicitly prepend the path.

you don't need to echo, just a plain redirect is enough to empty the file

Empties all files in /var/log over 5000k. Useful if /var goes crazy or if you just haven't cleaned up in a while.

When you don't have c_rehash handy. Really simple - if you have a .pem file that doesn't really contain a x509 cert (let's say, newreq.pem), it will create a link, simply called '.0', pointing to that file.

Works in Ubuntu, I hope it will work on all Linux machines. For Unixes, tail should be capable of handling more than one file with '-f' option.

This command line simply take log files which are text files, and not ending with a number, and it will continuously monitor those files.

Putting one alias in .profile will be more useful.

It happened to me that I got a season of a tv-show which had all files under the same folder like /home/blah/tv_show/season1/file{1,2,3,4,5,...}.avi

But I like to have them like this:

/home/blah/tv_show/season1/e{1,2,3,4,5,...}/file{1,2,3,4,5,...}.avi

So I can have both the srt and the avi on one folder without cluttering much. This command organizes everything assuming that the filename contains Exx where xx is the number of the episode.

You may need to set:

if your filenames have spaces.

This command is useful if you accidentally untar or unzip an archive in a directory and you want to automatically remove the files. Just untar the files again in a subdirectory and then run the above command e.g.

I needed this for wine.

You can use multiple field separators by separating them with | (=or).

This may be helpful when you want to split a string by two separators for example.

#echo "one=two three" | awk -F "=| " {'print $1, $3'}

one three

Split File in 19 MB big parts, putting parts together again via

cat Nameforpartaa Nameforpartab Nameforpartac >> File

You can read, add, delete and modify Windows permissions from Linux using smbcacls from the smb-client package.