sudo date -s "$(curl -sI --head http://google.com | grep ^Date: | sed 's/Date: //g')"
curl -I 'https://example.com' 2>/dev/null | grep -i '^date:' | sed 's/^[Dd]ate: //g'
curl -I http://example.com 2>&1 | grep Date:
sudo date -s "$(curl -I http://example.com 2>&1 | grep Date: | cut -d' ' -f5-8)Z"
dateFromServer=$(curl -v --insecure --silent https://nist.time.gov/ 2>&1 | grep '< Date' | sed -e 's/< Date: //')
formattedTime=$(date +"%d%m%Y%H%M%S" -d "$dateFromServer")
echo "Current time (DDMMYYYYHHMMSS): $formattedTime"
for bash
cat </dev/tcp/time.nist.gov/13
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