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Generate a random MAC address with capital letters
This will show all changes in all log files under /var/log/ that are regular files and don't end with `gz` nor with a number
if you want to replace "foo" with "bar" in all files in a folder, and put the resulting files into a new subfolder
this adds a random color to your prompt and the external ip.
useful if you are using multiple mashines with the same hostname.
shows only folders, that are MB or GB in total size
gets the last number of the mac address to use it for other stuff
you will hear how many seconds since 1.1.1970 in english words with billions, millions and thousands.
this is very useful, if you want to get over to use the unixtimestamp instead of the 24 hour clock in your dayly life