I just looked over the slides of a presentation one of my trainees bought back from Chemnitz, and there was this nifty one-line command, with which you can generate a random sha1sum for your authkeys file.

Now, since I’m a bit lazy here’s the full command line to fill /etc/ha.d/authkeys for you:

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node2 ~ [0] > echo "auth 1
1 sha1 $( dd if=/dev/urandom count=4  2> /dev/null | openssl dgst -sha1 )"