a: Show both listening and non-listening,
t: Show TCP,
n: Show numerical addresses instead of trying to determine symbolic host, port or user names,
u: Show UDP,
p: Show the PID and name of the program to which each socket belongs.
You have to use tail if you want to follow more than one file:
More info about inodes: Check this doc !
The first report line provides statistics concerning the time since the system was started.
Some interactive commands
h: display help
c: toggle between process name only / full command line
u: show the processes for a specific user only
n: display a maximum of n processes
k: kill a process
H: show threads (also called Light Weight Processes)
z: toggle between monochrome and color display
Shell keyboard shortcuts