Unix
Which of the following commands is used to obtain a list of all files by modification time?

ls -1
ls -R
ls -t
ls -i

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Unix
The % key allows you

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

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