| Lesson 7 | Other netstat command options |
| Objective | Match the netstat command options to their correct description. |
netstat Command Options | Statistics
You may obtain slightly different statistical information on network traffic from netstat using the -s option. This option reports a standard set of statistics from the TCP/IP protocol stack, organized by protocol. Here is a part of that output:
host$ netstat -s
Tcp:
699 active opens
0 passive opens
31 failed connection attempts
452 connection resets received
1 connections established
80902 segments received
66190 segments send out
3554 segments retransmited
Correctly interpreting this data requires a fairly detailed knowledge of TCP/IP.
Continually Monitoring Network Status
The -c option to netstat tells the program to generate its output continuously at one-second intervals. The command:
host$ netstat –ct
will generate a list of active TCP connections every second.
Checking memory availability for the TCP/IP internals
The -m option to netstat will report on memory usage by the TCP/IP stack (except on Linux, so we cannot demonstrate this feature).
host$ netstat -m
netstat Command Options - Exercise
Linux System Administration