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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.
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,…):
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The glob pattern * expands to all files, no need for the 'ls' command.
The quotes around "$i" make sure filenames with spaces in them are handled correctly.
mplayer determines if it is a media file and plays it, or gives errors and the loop asks if this file has to be removed.
Old drive with lots of music or unsorted drive? This command will play all mp3 files in a folder and after playing one song or pressing q, it will ask you if you want to delete the file.
when bad day comes...
This command will delete all files and folders except 'skipme'. it could be a file or a folder.
Useful for when you download movies split into < 700mb parts.
mencoder is generally included with mplayer.
sudo port install mplayer
If you have a directory with lot of backups (full backups I mean), when it gets to some size, you could want to empty some space. With this command you'll remove half of the files. The command assumes that your backup files starts with YYYYMMDD or that they go some alphabetical order.
This command removes and then cvs removes all files in the current directory recursively.
Replace YOURPASSWORDHERE with the pdf password. [qpdf needed]
Install Ksuperkey one command in Kubuntu.
You must manually add ksuperkey to autostart in System Settings KDE.
remove old index.html if you download it again and organiaz the java script tag on the file index.html
While `echo rm * | batch` might seem to work, it might still raise the load of the system since `rm` will be _started_ when the load is low, but run for a long time. My proposed command executes a new `rm` execution once every minute when the load is small.
Obviously, load could also be lower using `ionice`, but I still think this is a useful example for sequential batch jobs.
This is just a proof of concept: A FILE WHICH CAN AUTOMOUNT ITSELF through a SIMPLY ENCODED script. It takes advantage of the OFFSET option of mount, and uses it as a password (see that 9191? just change it to something similar, around 9k). It works fine, mounts, gets modified, updated, and can be moved by just copying it.
USAGE: SEE SAMPLE OUTPUT
The file is composed of three parts:
a) The legible script (about 242 bytes)
b) A random text fill to reach the OFFSET size (equals PASSWORD minus 242)
c) The actual filesystem
Logically, (a)+(b) = PASSWORD, that means OFFSET, and mount uses that option.
PLEASE NOTE: THIS IS NOT AN ENCRYPTED FILESYSTEM. To improve it, it can be mounted with a better encryption script and used with encfs or cryptfs. The idea was just to test the concept... with one line :)
It applies the original idea of http://www.commandlinefu.com/commands/view/7382/command-for-john-cons for encrypting the file.
The embedded bash script can be grown, of course, and the offset recalculation goes fine. I have my own version with bash --init-file to startup a bashrc with a well-defined environment, aliases, variables.
Linux users wanting to extract text from PDF files in the current directory and its sub-directories can use this command. It requires "bash", "ps2ascii" and "par", and the PARINIT environment variable sanely set (see man par). WARNING: the file "junk.sh" will be created, run, and destroyed in the current directory, so you _must_ have sufficient rights. Edit the command if you need to avoid using the file name "junk.sh"
Take a screenshot, give $1 seconds pause to choose what to screenshot, then upload and get URI of post in ompdlr.org
Copies file to a temporary location, edit and set to real file's time stamp then copy back. Assumes access to /tmp and has $EDITOR, but can be replaced with better values.
Only zsh supports it. This removes all the regular files in the current directory except for any .tex and .pdf files.
Good for when your working on building a clean source install for RPM packaging or what have you. After testing, run this command to compare the original extracted source to your working source directory and it will remove the differences that are created when running './configure' and 'make'.