Linux Terminal Shortcuts (many begin with ctrl+)

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Across
  1. 2. As I start typing in the name of a command to execute, what key can I press twice to see what all commands begin with the letters I have typed in so far?
  2. 4. Keyboard shortcut to logout of the current user session.
  3. 5. Keyboard shortcut to jump to the beginning of the command line.
Down
  1. 1. Keyboard shortcut to jump to the end of the command line.
  2. 3. Keyboard shortcut to clear from the cursor to the beginning of the command line.