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oneliner to transfer a directory using ssh and tar
this will tar/send/untrar a whole directory.

Download a file and uncompress it while it downloads
This will uncompress the file while it's being downloaded which makes it much faster

LIST FILENAMES OF FILES CREATED TODAY IN CURRENT DIRECTORY
This version eliminates the grep before the awk, which is always good. It works for GNU core utils and ensures that the date output of ls matches the format in the pattern match, regardless of locale, etc. On BSD-based systems, you can easily eliminate both the grep and the awk: find . -maxdepth 1 -Btime -$(date +%kh%lm) -type f

Get your Firefox bookmarks
Extracts yours bookmarks out of sqlite with the format: dateAdded|url

Kill any process with one command using program name
Somtime one wants to kill process not by name of executable, but by a parameter name. In such cases killall is not suitable method.

Find the package that installed a command

Display BIOS Information
read the memory from C:0000 to F:FFFF without the need auf dmidecode

Print just line 4 from a textfile
Prints the 4th line and then quits. (Credit goes to flatcap in comments: http://www.commandlinefu.com/commands/view/6031/print-just-line-4-from-a-textfile#comment.)

Add all unversioned files to svn

determine if tcp port is open
@putnamhill, no need if statement in that case. && is a AND and || is a OR

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