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oathtool -b --digits=6 --totp=sha1 "ABCDEFGHIJKLMNOPQRSTUVWXYZ012345"


Tip
titleA note on security

As with using a smartphone as the TOTP client, husers should ensure access to the oathtool command line is protected.   If a shell script is used to provide the command line then this should be readable only by the user (mode 700 or u+rx).

It is also strongly recommended that a screenlock is used to prevent access to the display and tool when away from the monitor.   Users may also want to consider protecting the key with, for example, PGP 2 or GnuPG.

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