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Rename all .jpeg and .JPG files to have .jpg extension
the "i" controls case sensitiveness. It's slightly inefficient since it uselessly renames .jpg to .jpg, but that's more than compensated by launching only one process instead of two, besides being shorter to write.

Watch how many tcp connections there are per state every two seconds.
slighty shorter

What is my ip?

Verbosely delete files matching specific name pattern, older than 15 days.

print offsets of file disk for losetup/loop-mount
If you want to mount partitions of an disk image, you need the offsets and sizes of the partitions. This command prints them in the format that losetup understands.

display a smiling smiley if the command succeeded and a sad smiley if the command failed
you could save the code between if and fi to a shell script named smiley.sh with the first argument as and then do a smiley.sh to see if the command succeeded. a bit needless but who cares ;)

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

Quick access to ASCII code of a key

Advanced python tracing
Trace python statement execution and syscalls invoked during that simultaneously

Hide or show Desktop Icons on MacOS
Hides all Files and Folders on the MacOS Desktop. To show files and folders, type "true" instead of "false". "Finder" at the end is case sensitive, "finder" doesn’t work

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