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list files recursively by size

check open ports without netstat or lsof

Dumping Audio stream from flv (using ffmpeg)

a function to find the fastest DNS server
http://public-dns.info gives a list of online dns servers. you need to change the country in url (br in this url) with your country code. this command need some time to ping all IP in list.

speedtest
alias speedtest='wget --output-document=/dev/null http://speedtest.wdc01.softlayer.com/downloads/test500.zip'

list block devices
Shows all block devices in a tree with descruptions of what they are.

renames multiple files that match the pattern
Useful when you want to quickly rename a bunch of files.

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

list unique file extensions recursively for a path, include extension frequency stats
Get the longest match of file extension (Ex. For 'foo.tar.gz', you get '.tar.gz' instead of '.gz')

Prevent shell autologout
Unset TMOUT or set it to 0 in order to prevent shell autologout. TMOUT is the number of seconds after which the present shell will be killed if it has been idle for that long.


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