Novell LINUX ENTERPRISE SERVER 10 - INSTALLATION AND ADMINISTRATION 11-05-2007, Руководство по установке

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lo 16436 0 23728 0 0 0 23728 0 0 0 LRU
When displaying network connections or statistics, you can specify the socket type to
display: TCP (
-t
), UDP (
-u
), or raw (
-r
). The
-p
option shows the PID and name
of the program to which each socket belongs.
The following example lists all TCP connections and the programs using these connec-
tions.
linux:~ # netstat -t -p
Active Internet connections (w/o servers)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Pro
tcp 0 0 linux:33513 www.novell.com:www-http ESTABLISHED 6862/fi
tcp 0 352 linux:ssh linux2.:trc-netpoll ESTABLISHED 19422/s
tcp 0 0 localhost:ssh localhost:17828 ESTABLISHED -
In the following, statistics for the TCP protocol are displayed:
tester@linux:~> netstat -s -t
Tcp:
2427 active connections openings
2374 passive connection openings
0 failed connection attempts
0 connection resets received
1 connections established
27476 segments received
26786 segments send out
54 segments retransmited
0 bad segments received.
6 resets sent
[...]
TCPAbortOnLinger: 0
TCPAbortFailed: 0
TCPMemoryPressures: 0
16.5 The
/proc
File System
The
/proc
file system is a pseudo file system in which the kernel reserves important
information in the form of virtual files. For example, display the CPU type with this
command:
316 Installation and Administration