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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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Open a window that displays camera capture.
Framerate, width and height may be changed to match your needs.
I have a directory containing log files. This command delete all but the 5 latest logs. Here is how it works:
* The ls -t command list all files with the latest ones at the top
* The awk's expression means: for those lines greater than 5, delete.
Use of hotcopy for safety/stability of the backups.
It deletes all removed files, updates what was modified, and adds new files.
Returns a JSON object, by connecting to the 'test' endpoint of the Twitter API. Simplest way to check if you can connect to Twitter. Output also available in XML, use '/help/test.xml' for that
This command dumps all SVN repositories inside of folder "repMainPath" (not recursively) to the folder "dumpPath", where one dump file will be created for each SVN repository.
Record audio to MP3 stream and video to MPEG-4 stream from webcam to AVI file using mencoder. Gives floating point exception in some mencoder versions.
View webcam output using mplayer, with correct fps and outfmt settings according to my webcam model.
Record from a webcam, audio using ALSA encoded as MP3, video as MPEG-4.
Remove everything in current directory except files starting with "ca".
Extracts an MP3 encoded audio stream from an input video file.
Creates a new video file with video stream copied from input file and a different audio stream
Remove sound from input video file, output video stream is copied from input video stream, with no audio.
Fixes the faulty files with perl, which may exist on more platforms
This command creates tar zip of a directory and its sub-directories.
AFAIR this is the wording ;)
Same thing, only "head" instead of grep/egrep..
Useful for backing up old files, custom logs, etc. via a cronjob.
According to tune2fs manual, reserved blocks are designed to keep your system from failing when you run out of space. Its reserves space for privileged processes such as daemons (like syslogd, for ex.) and other root level processes; also the reserved space can prevent the filesystem from fragmenting as it fills up. By default this is 5% regardless of the size of the partition.