Unix
The % key allows you

to move the cursor backward to the beginning of a word
to move the cursor to a matching delimiter, when a delimiters a parenthesis, a bracket, or a brace.
to move the cursor to the first column in the current line
to move the cursor to the upperleft corner of the screen

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Unix
The ls -l command tells

All of these
how large the file is and when the file was last modified.
None of these
the name of the group owner of the file
who the owner of the file is

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