[R-sig-Debian] EXPKEYSIG for CRAN Ubuntu repositories

Michael Rutter m@rutter @end|ng |rom gm@||@com
Sun Oct 18 19:16:28 CEST 2020

If you receive the following error when updating and Ubuntu machine that 
utilizes the CRAN based Ubuntu repositories, there is a simple fix.

The following signatures were invalid: EXPKEYSIG 51716619E084DAB9 
Michael Rutter <marutter using gmail.com>

EXPKEYSIG indicates that the key on your system has expired.  I renewed 
my key a month ago, so you just need to update my key using normal 
procedures.  For example:

sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 

Or any of the other methods mentioned on the CRAN Ubuntu page 

If you have any questions, please let me know.

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