reinstall or just change name

[Gary J. Kirkpatrick]

I am selling my little laptop.  Should I reinstall the operating system,
which I presume would be a better way to remove my files (albeit imperfect)
or should I just change the user name/password?

If the latter should I make a new user then delete myself as user? would
that delete my files?

What are the commands to change user name and password?

thanks


garyk
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