Today I Learned is an open-source project by Hashrocket that exists to catalogue the sharing & accumulation of knowledge as it happens day-to-day. Posts have a 200-word limit, and posting is open to any Rocketeer as well as selected friends of Hashrocket. We hope you enjoy learning along with us.
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Sometimes you completely mess up a command on your terminal and need to start over again. UNIX has a control key for killing a line: control+u

読よむ

$ ddtae
control + u
$ 
$ date
Mon Sep 26 12:23:39 EDT 1983

Today I Learned

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