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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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if you lose your sound, this will restart alsa and you will get your sound back
Print 0 through 99, each on a separate line.
Find all files that contain string XXX in them, change the string from XXX to YYY, make a backup copy of the file and save a list of files changed in /tmp/fileschanged.
Will unmount a mount that has already dropped but is locked by a process.
srchpymod cairo Surface
['ImageSurface', 'PDFSurface', 'PSSurface', 'SVGSurface', 'Surface', 'SurfacePattern', 'XlibSurface']
cd - would return to the previous directory of your cd command. NB: previous dir is always stored in $OLDPWD variable.
After you install/remove lots of packages, there are many packages marked with 'rc'. This script help you to purge these packages, it will save some spaces from your disk.
This command is more for demonstrating piping to vim and jumping to a specific line than anything else.
Exit vim with :q!
+23 jumps to line 23
- make vim receive the data from the pipe
Just a quick and simple one to demonstrate Bash For loop. Copies 'file' to multiple ssh hosts.
Find random strings within /dev/urandom. Using grep filter to just Alphanumeric characters, and then print the first 30 and remove all the line feeds.
(relies on 'imagemagick')
Convert all .png files to .gif. This can also go the other way if you reverse the file extensions in the command, e.g.:
for file in *.gif; do convert "$file" "$(basename $file .gif).png"; done
If the file is named 'example1.png' it will be named 'example1.gif' when it is complete.
(relies on 'imagemagick')
This command will convert all .pdf files in a directory into a 800px (wide or height, whichever is smaller) image (with the aspect ratio kept) .jpg.
If the file is named 'example1.pdf' it will be named 'example1.jpg' when it is complete.
This is a VERY worthwhile command! People pay hundreds of dollars for this in the Windows world.
My .jpg files average between 150kB to 300kB, but your's may differ.
.daa is a non-standard disk image format that can not be read by any other program. This is how you can extract the files though.
PowerISO binary for Linux: http://www.poweriso.com/poweriso-1.3.tar.gz
"This is a free utility for linux which can extract, list, and convert image files (including ISO, BIN, DAA, and other formats). Type " poweriso -? " for detailed usage information. File Size: 278KB"
In July 2008, there was an uproar over Foxconn motherboards feeding Linux installs incorrect ACPI information (http://ubuntu-virginia.ubuntuforums.org/showthread.php?t=869249).
Foxconn has gladly corrected their mistake, but make sure it's not happening on your motherboard!
After running the command, just view the 'dsdt.dsl' in any editor you like.
Use mencoder to concatenate (join) multiple video files together.
In Mac OS X, pressing Command+H will hide an application. While that application's windows vanish, there is no other visual feedback, meaning there is no immediate distinction between an application running with no windows open and a hidden application. This command turns hidden applications' icons transparent, providing a clear and obvious distinction.
Change YES to NO to restore the previous functionality.
Prints a graphical directory tree from your current directory