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Full Discussion: Setting the correct parameter
Top Forums Shell Programming and Scripting Setting the correct parameter Post 302434227 by KenJackson on Friday 2nd of July 2010 12:45:28 AM
Old 07-02-2010
Here's my script for printing the local IP.

I prefer to get the actual address from the network device instead of the address it's supposed to be in /etc/hosts. But some of my machines have the IP address assigned to br0 device instead eth0, so I check both.
Code:
#!/bin/sh
IP="$(/sbin/ifconfig br0 2>/dev/null|grep 'inet ')"
test -z "$IP"  &&  IP="$(/sbin/ifconfig eth0|grep 'inet ')"
echo $IP | sed 's/.*addr:\([0-9.]*\).*/\1/'

Of course, If you want the result in a variable, you could capture the last line back into IP:
IP="$(echo $IP | sed 's/.*addr:\([0-9.]*\).*/\1/')"
This User Gave Thanks to KenJackson For This Post:
superHonda123
 

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LEARN ABOUT DEBIAN

aoe-stat

aoe-stat(8)						      System Manager's Manual						       aoe-stat(8)

NAME

       aoe-stat - print aoe device status report

SYNOPSIS

       modprobe aoe
       aoe-stat
       env sysfs_dir=/sys aoe-stat

DESCRIPTION

       The aoe-stat script collects information on ATA over Ethernet devices from sysfs.

       For each AoE device the kernel has discovered, there is one row in the script's output.	Each row has the following columns.

       devicename
	      The device name is of the form eX.Y,
	       with X being the AoE device shelf address, and Y being the AoE slot address.

       size   The size of the AoE device is in gigabytes (billions of bytes).

       ifname The network interface name is printed in the third column.

       payload
	      The  number  of  bytes  read  from  or written to the storage target in each AoE packet appears in the fourth column, unless the aoe
	      driver does not export this information.

       status The device status is in the last column.	Possible values are  up,  down, and  down,closewait.  The "up" status means the aoe driver
	      considers  this  device  ready for I/O.  The "down" status means the opposite.  The "down,closewait" status means that some software
	      still has the device open, and when this straggler closes the device, it will enter the "down" state.

ENVIRONMENT VARIABLES

       If the sysfs_dir variable is set in the environment, it will override the default location where  aoe-stat  will  look  for  sysfs,  namely
       /sys.

WARNINGS

       If the minor device number of a device node does not match that of its namesake, aoe-stat will print a warning as shown below.

	      nai:~# aoe-stat
		    e0.3	 0.104GB   eth0 up
		    e0.4      4398.046GB   eth0 up
		   e20.0      1000.215GB   eth0 up
		   e42.0      2000.431GB   eth0 up
	      aoe-stat Warning: device node /dev/etherd/e45.1 has wrong minor device number
		   e45.1      1152.874GB   eth0 up

       Using  such  a  device  node  is dangerous, because its name doesn't match the actual device that you would be reading from and writing to.
       Such a broken device node should be removed.  Device nodes are created by udev or (on systems without udev) by aoe-mkdevs.

EXAMPLE

       In this example, the root user on a host named nai loads the aoe driver module and then prints a list of all  the  available  aoe  devices.
       Then  he  remembers to bring up the storage network interfaces, does an AoE discovery, and prints the list again.  This time the list shows
       all the devices in shelf seven.

	      nai:~# modprobe aoe
	      nai:~# aoe-stat
	      nai:~# ifconfig eth3 up
	      nai:~# aoe-discover
	      nai:~# aoe-stat
		    e0.0     10995.116GB   eth0 up
		    e0.1     10995.116GB   eth0 up
		    e0.2     10995.116GB   eth0 up
		    e1.0      1152.874GB   eth0 up
		    e7.0       370.566GB   eth0 up
	      nai:~#

SEE ALSO

       aoe-discover(8), aoe-interfaces(8), aoe-mkdevs(8), aoe-mkshelf(8), aoetools(8), udev(7).

AUTHOR

       Ed L. Cashin (ecashin@coraid.com)

																       aoe-stat(8)
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