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I tried to use the tree command in a bootable USB Ubuntu environment but it showed that it is not installed so I tried sudo apt install tree, but it didn't work and reported that it was unable to locate package and also said to enable component universe. I don't know what component universe is. How can I fix this?

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1 Answer 1

Reset to default
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To enable universe, run

sudo add-apt-repository universe

Then update the indexes:

sudo apt update

You’ll be able to install the tree package once that’s done:

sudo apt install tree
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