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Find Files Containing a Text Pattern
find . -iname "*.txt" -exec grep -l "hello" {} +
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Create a Bootable USB from an ISO Image
sudo dd if=/path/to/image.iso of=/dev/sdX bs=4096k
Replace /dev/sdX with your USB device, for example, /dev/sdb.
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This is a quick, simple tip (but maybe no very obvious for the first time) for getting back the volume control tray icon in case you removed it by mistake.

The volume control tray icon is actually included in the “Indicator Applet”, together with the Internet connections and the chat/mail/messenger icons, rather than being available by itself. To add it back to the panel:

Right click on the panel, click Add to Panel…:


Now select Indicator Applet from the list and click the Add button.

Here it is:

Notice that you can get all the default icons by adding the Indicator Applet Complete applet:

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Wilfredo says:

Man, you are a life saver!! I was wondering WHY the volume control went away if I didn’t close it.

Thanks a Million!

Craciun Dan says:

Great to know it helped you!

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