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Compute running average for a column of numbers
This is an on-line algorithm for calculating the mean value for numbers in a column. Also known as "running average" or "moving average".

get a random 0/1, use it for on/off, yes/no
use it to add a random boolean switch to your script

floating point operations in shell scripts
allows you to use floating point operations in shell scripts

To get internet connection information .
To get the connection information of protocol tcp and extended infortmation.

recursive base64 encoding -- Cipher for the Poor ?
Just for fun, I searched a simple way to encrypt some text. Simple base64 encoding seemed a good start so I decided to "amplify" encoding using repeted base64 encoding. Of course, this is not really secure but can be useful to hide datas to most part of humans ;). Do not hesitate to provide better solutions or else.

Get your current Public IP

Search some text from all files inside a directory

See a full list of compiler defined symbols
From http://lists.debian.org/debian-devel/2001/01/msg00971.html .

Convert CSV to JSON
Replace 'csv_file.csv' with your filename.

Copy the sound content of a video to an mp3 file
-vn removes tha video content, the copy option tells ffmpeg to use the same codec for generating the output


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