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Substitute audio track of video file using mencoder
Creates a new video file with video stream copied from input file and a different audio stream

Verbosely delete files matching specific name pattern, older than 15 days.

list all executables in your path
If run in bash, this will display all executables that are in your current $PATH

Find usb device in realtime
Using this command you can track a moment when usb device was attached.

Remove all files previously extracted from a tar(.gz) file.

Fast command-line directory browsing
After typing cd directory [enter] ls [enter] so many times, I figured I'd try to make it into a function. I was surprised how smoothly I was able to integrate it into my work on the command line. Just use cdls as you would cd. It will automatically list the directory contents after you cd into the directory. To make the command always available, add it to your .bashrc file. Not quite monumental, but still pretty convenient.

Convert the output of one or more (log, source code ...) files into html,
Requires the "enscript" package. frank@zappa:~# sudo apt-get install enscript Or http://www.codento.com/people/mtr/genscript/ "use your head"

finds the c files with lines containing 'mcs', in the folders under the current folder

Short one line while loop that outputs parameterized content from one file to another
The above is an example of grabbing only the first column. You can define the start and end points specifically by chacater position using the following command: $ while read l; do echo ${l:10:40}; done < three-column-list.txt > column-c10-c40.txt Of course, it doesn't have to be a column, or extraction, it can be replacement $ while read l; do echo ${l/foo/bar}; done < list-with-foo.txt > list-with-bar.txt Read more about parameter expansion here: http://wiki.bash-hackers.org/syntax/pe Think of this as an alternative to awk or sed for file operations

draw line separator
Even shorter: $ seq -s '*' 120|tr -d '[0-9]'


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