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@logikal
Created November 21, 2018 03:24
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Ever wondered how far off your clock was? now you can know.
#!/usr/bin/env bash
# finds the maximum clock drift in the last 30 days
# using the stats files kept in /var/log/ntpstats
# We need somewhere temporary to keep our concatenated results
TMPFILE=$(mktemp) || exit 1
FILELIST=$(find /var/log/ntpstats/ -mtime -31 -type f)
cut -d' ' -f 5 $FILELIST| sort -g > $TMPFILE
MIN_OFFSET=$(head -n 1 $TMPFILE)
MAX_OFFSET=$(tail -n 1 $TMPFILE)
echo "$MIN_OFFSET $MAX_OFFSET"
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