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Watch TCP, UDP open ports in real time with socket summary.

Export log to html file
Logtool is a nice tool that can export log file to various format, but its strength lies in the capacity of colorize logs. This command take a log as input and colorize it, then export it to an html file for a more confortable view. Logtool is part of logtool package.Tested on Debian.

Find dupe files by checking md5sum

Disable beep sound from your computer
This command will disable the beep sound from the PC speaker.

Change the ownership of all files owned by one user.
Finds all files in /home owned by UID 1056 and changes to 2056.

See multiple progress bars at once for multiple pipes with pv
In this example we convert a .tar.bz2 file to a .tar.gz file. If you don't have Pipe Viewer, you'll have to download it via apt-get install pv, etc.

Generate QR code for a WiFi hotspot
Prompts for network name (SSID) and password, and generates (as qr-wifi.png) a WiFi QR code (e.g. "WIFI:S:mynet;T:WPA;P:mypass;;" for mynet/mypass). Dependencies [sudo apt-get install]: qrencode zenity

Resample a WAV file with sox
Change the sample rate with sox, the swiss army knife of sound processing.

Execute a command at a given time
This command will create a popup reminder window to assist in remembering tasks http://i.imgur.com/2n7viiA.png is how it looks when created

Watch postgresql calls from your application on localhost
It's certainly not nicely formatted SQL, but you can see the SQL in there...


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