p2ndemic

List of Linux networking tools

netstat (ss)

Displays contents of /proc/net files. It works with the Linux Network Subsystem, it will tell you what the status of ports are ie. open, closed, waiting, masquerade connections. It will also display various other things. It has many different options. Netstat (Network Statistic) command display connection info, routing table information etc. To displays routing table information use option as -r.

Sample output:

Proto Recv-Q Send-Q  Local Address          Foreign Address        (state)    
tcp4 0 0 127.0.0.1.62132 127.0.0.1.http ESTABLISHED

	# IPv6 Configuration
	# -> note that I have disabled ip6 for our internet-connection (wan/eth0) because
	# -> my upstream/ISP (still) does not do IPv6. The rest, even localhost, does ip6 stuff.
	net.ipv6.conf.all.disable_ipv6 = 0
	net.ipv6.conf.default.disable_ipv6 = 0
	net.ipv6.conf.lo.disable_ipv6 = 0
	net.ipv6.conf.eth0.disable_ipv6 = 1
	net.ipv6.conf.wan.disable_ipv6 = 1

	# Packet Forwarding

	#!/bin/bash -e
	# extract_cookies.sh:
	#
	# Convert from Firefox's cookies.sqlite format to Netscape cookies,
	# which can then be used by wget and curl. (Why don't wget and curl
	# just use libsqlite if it's installed?)

	# USAGE:
	#
	# $ extract_cookies.sh > /tmp/cookies.txt

	# See following for more information: http://www.infinitered.com/blog/?p=19


	# Path ------------------------------------------------------------
	#export PATH=/foo:/foo/bar:$PATH # add the directories you want included in the path

	if [ -d ~/bin ]; then
	export PATH=:~/bin:$PATH # add your bin directory to your path, if you have it. It's a good place to add all your scripts
	fi

	sqlite3 -separator ' ' ${COOKIES:-Cookies} \
	'select host_key, "TRUE", path, "FALSE", expires_utc, name, value from cookies'