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Commands by dragonauta

Commands by dragonauta from sorted by
Terminal - Commands by dragonauta - 3 results
echo foo | ncat [ip address] [port]
2012-10-26 10:53:47
User: dragonauta
Functions: echo
Tags: Network udp tcp icmp protocol socket
-1
Up
Down
send echo to socket network

you can use a pair of commands to test firewalls.

1st launch this command at destination machine

ncat -l [-u] [port] | cat

then use this command at source machine to test remote port

echo foo | ncat [-u] [ip address] [port]

First command will listen at specified port.

It will listen TCP. If you use -u option will listen UDP.

Second command will send "foo" through ncat and will reach defined IP and port.

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for i in `ls /sys/class/net/`; do echo $i: `cat /sys/class/net/$i/operstate`; done
2012-10-15 18:20:37
User: dragonauta
Functions: echo
Tags: Network device
0
Up
Down
Check the status of a network interface

no need for installing mii-tools, all generic tools

working under archlinux.

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curl -s mi-ip.net | grep '"ip"' | cut -f2 -d ">" | egrep -o '[0-9.]+'
2012-10-15 16:48:20
User: dragonauta
Functions: cut egrep grep
Tags: Network device ip address
0
Up
Down
What is my ip?

looks at html for "ip" (it's a CSS class), then a little of cut and egrep to get IPv4 address.

I use this oneliner into conky.

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