Looking at "netstat -na" output and suddenly wondered about something I've always just accepted.

Listening ports often get multiple identical lines, like:

tcp4 0 0 23.139.82.3.53 *.* LISTEN

I know my nameserver is listening here.

But why does netstat give 32 identical lines? Only one named process is running. Threads, maybe? #sysadmin

And yes, I read netstat(1). Many times. #sysadmin

Pesky demons.

#sysadmin #linux #unix

Magic!

#linux #unix #sysadmin #sudo