I have a script called ' nsaddrs ', which lists the IP addresses ofthe nameservers for a given domain. It is basically:

addr `dig +short ns $1`

addr is one of my utility programs; it does IP address lookups forhostnames. Normally you give it hostnames on the command line, but forbulk lookups you can give it no arguments and it will read hostnamesfrom standard input, one per line.

Then one day I used nsaddr on a domain that didn't exist and it

Most people doing threading in Python know about Python's GlobalInterpreter Lock (GIL), which causes only one thread to be running inthe CPython interpreter at any one time. This means that threadedcode already has a certain amount of implicit locking going on,making certain operations thread-atomic without you writing explicitlocks.

The important thing about the GIL for this is that it protectsbytecodes, not Python statements . If something happens in a singlebytecode, it's protected; otherwise, you need explicit locking

Presented once again in illustration:

; sdig ns isotech.com.cydns2.lordosinfo.com.dns1.lordosinfo.com.; sdig ns lordosinfo.com.dns1.edynet.com.cy.dns1.lordosinfo.com.; sdig ns edynet.com.cy.dns2.netconnect.com.cy.dns1.netconnect.com.cy.

At the moment:

• dns2.netconnect.com.cy is not responding,
• dns1.edynet.com

This week we received 20,583 email messages from 213 different IPaddresses. Our SMTP server handled 21,213 sessions from 1,044different IP addresses. This is a significant jump in incoming emailcompared to last week .

We saw a major jump in connections compared to last week :238,300 connections from at least 32,400 different IP addresses.Broken down by day, it goes: