Initializing from a current installation

Bob Tennent <[email protected]>
Newsgroups gmane.comp.tex.live
Message-ID <CAGtK6=HEaNNxTARKx2LWndrfUMtZJK32yYhtm-NyLNYQarELAA@mail.gmail.com>
Following the steps from this.  tlmgr option repo says

Default package repository (repository):
ftp://ftp.math.utah.edu/pub/tlpretest/

echo $PATH says

/usr/local/texlive/pretest/bin/x86_64-linux:...

but sudo tlmgr update --self  does nothing.   What am I doing wrong?

Bob T.
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