Commands by erlebnishengst (3)

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

Reinstall a Synology NAS without loosing any data from commandline.
Seen many questions how-to reinstall synology nas dsm without loosing data, here you go. Wait for a few min and then head over to http://nasip and setup your fresh installed nas.

url shortner using google's shortner api
First get a api key for google url shortner from here https://developers.google.com/url-shortener/ Then replace the API_KEY in the command

Display the standard deviation of a column of numbers with awk
This will calculate a running standard deviation in one pass and should never have the possibility for overflow that can happen with other implementations. I suppose there is a potential for underflow in the corner case where the deltas are small or the values themselves are small.

check open ports without netstat or lsof

Get HTTP status code with curl AND print response on new line

list files recursively by size

Mount a .iso file in UNIX/Linux
"-o loop" lets you use a file as a block device

Set OS X X11 to use installed Mathematica fonts

small CPU benchmark with PI, bc and time.
$ # 4 cores with 2500 pi digits $ CPUBENCH 4 2500 $. $ every core will use 100% cpu and you can see how fast they calculate it. $ if you do 50000 digitits and more it can take hours or days


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