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Find C/C++ source code comments
This is a naive way of finding source code comments in source code files that use C-like comments: // and /*...*/

prettier
Slightly shorter to type

Batch Convert SVG to PNG (in parallel)
Convert some SVG files into PNG using ImageMagick's convert command. Run the conversions in parallel to save time. This is safer than robinro's forkbomb approach :-) xargs runs four processes at a time -P4

Print all the lines between 10 and 20 of a file
Similarly, if you want to print from 10 to the end of line you can use: sed -n '10,$p' filename This is especially useful if you are dealing with a large file. Sometimes you just want to extract a sample without opening the entire file. Credit goes to wbx & robert at the comments section of http://www.commandlinefu.com/commands/view/348/get-line1000-from-text.#comment

Plowshare, download files from cyberlocker like rapidshare megaupload ...etc
you need to have plowshare installed http://code.google.com/p/plowshare/ plowshare supports Megaupload, Rapidshare, 2Shared, 4Shared, ZShare, Badongo, Divshare.com, Depositfiles, Netload.in, Sendspace, Usershare, x7.to and some others file sharing services.

Which processes are listening on a specific port (e.g. port 80)
swap out "80" for your port of interest. Can use port number or named ports e.g. "http"

Regnerate Exif thumbnail.
Regnerate Exif thumbnail.

calulate established tcp connection of local machine
worked on ubuntu 9.04 and cygwin with MS netstat

Find files modified since a specific date
This command uses -newerXY to show you the files that are modified since a specific date. I recommend looking for "-newerXY" on the manpage to get the specifics.

Sort a character string
Sorts a character string, using common shell commands.


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