IDidNotKnow

Say you need to md5sum 46 files, all ending in “.foo” in a single directory. You might use your standard md5sum *.foo > md5sum.txt command to checksum them all in one process. Get coffee, it’s done, move on.

I think I once knew this, but forgot about it. Still, the fact remains:

I Did Not Know about multitail.

I sometimes want to turn off my MacBook Pro’s Airport wireless to save battery, even though its battery capacity is kinda awesome.

I just learned about pbzip2, which lets your multicore computer use more than one core when using the bzip2 compression algorithm.