« January 2007 | Main | June 2007 »
Slicehost, my current hosting company, is migrating clients to a new IP range. After updating DNS, I was curious to find out how long my old data would be cached.
dig +ttlid buscaluz.org @ns8.zoneedit.com
Next I wanted to monitor my local DNS server as the old entry expired.
watch -n 30 'dig +ttlid buscaluz.org | egrep ^b.*IN.*A'
Man, I love Linux!
Until recently, I thought dmidecode was an interesting curiosity but nothing more. That was until I needed to upgrade the BIOS on a classroom full of machines without disturbing the students. Instead of upgrading each system in a careful order, I jumped on systems as they became available. Eventually, I thought I was done but couldn't be sure. Then it hit me:
for I in {1..20}
do
ssh root@station$I dmidecode | grep -A 3 'BIOS Info' | grep Version
done
And that is why I love Linux!
