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- So let's have a look at the commands

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that we have seen in this lesson.

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It started with tee.

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Tee, which is useful in pipes to make sure

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that the output of the first
command is sent to a file

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as well as the pipe.

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History, which is remembering
everything that you are doing.

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And don't forget history minus
D if you did something that

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you rather don't want to be remembered.

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Alias, which allows you to
create your own commands.

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And then we have export,

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which is exporting variables
to sub shells as well.

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Let's go check out the lab.