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

Lock your KDE4 remotely (via regular KDE lock)
Forgot to lock your computer? Want to lock it via SSH or mobile phone or use it for scheduled lock? TIP: Make a alias for this (e. g. as "lock"). I found some howtos for ugly X11 lock, but this will use regular KDE locking utility. Note that KDE 3 is using utility with another name (I guess with the same argument --forcelock) Tested on Kubuntu 8.10. Stay tuned for remote unlock.

Calculate days on which Friday the 13th occurs
I removed the dependency of the English language

Create a new file

Finding files with different extensions
This is the way how you can find header and cpp files in the same time.

Print a random 8 digit number
Don't need to pipe the output into rs if you just tell jot to use a null separator character.

Convert a MOV captured from a digital camera to a smaller AVI
Convert those .mov files that your digital camera makes to .avi Adjust the bitrate (-b) to get the appropriate file size. A larger bitrate produces a larger (higher quality) .avi file and smaller bitrate produces a smaller (lower quality) .avi file. Requires ffmpeg (see man page for details) (tested with canon camera MOV files) Other examples: $ffmpeg -i input.mov -sameq -vcodec msmpeg4v2 -acodec pcm_u8 output.avi $ffmpeg -i input.mov -b 1024k -vcodec msmpeg4v2 -acodec pcm_u8 output.avi

How to stop MAC Address via IPTables
edit the /etc/sysconfig/iptables file and try to work whit this: -A INPUT -i (interface) -m mac (mac address) -j ACCEPT/DROP

Run a command, store the output in a pastebin on the internet and place the URL on the xclipboard
The URL can then be pasted with a middle click. This is probably useful when trying to explain problems over instant messaging when you don't have some sort of shared desktop.

Convert IP octets to HEX with no dots.
Converts IP octets to hex using printf command. Useful for generating pxeboot aliases in the pxelinux.cfg folder.


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