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7. the command line as as a shared world |
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In an earlier chapter, I wrote: |
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> You can think of the shell as a kind of environment you inhabit, in much |
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> the way your character inhabits an adventure game. |
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It turns out that sometimes there are other human inhabitants of this |
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environment. |
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Unix was built on a model known as "time-sharing". This is an idea with a lot |
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of history, but the very short version is that when computers were rare and |
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expensive, it made sense for lots of people to be able to use them at once. |