Debugging Rails with Operating System Tools

Part 4 in the series A Comprehensive Guide To Debugging Rails

Operating System Level Mirrors

Domain name/DNS info: View and debug DNS/IP issues using nslookup. To see the mail records (MX) for a domain type $ nslookup -type=mx oxbridgenotes.co.uk (note that you need to drop any possible âwwwâ in front of the domain here). Look up the IP addresses associated with a domain using $ nslookup www.oxbridgenotes.co.uk. Find out how long a DNS record will be cached for with $ nslookup -debug www.ox...