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Full Discussion: [SHELL] Output formatting
Top Forums Shell Programming and Scripting [SHELL] Output formatting Post 302238420 by cfajohnson on Friday 19th of September 2008 11:10:04 PM
Old 09-20-2008
Quote:
Originally Posted by DeCoTwc
Sorry to thread jack, could you explain that a little more please?


Say I have a file with 5 ip address's:
172.16.31.248
172.16.31.249
172.16.31.250
172.16.31.251
172.16.31.252
and I wanted to ping each one of them, I'd typically do something like:

Code:
#!/usr/bin/bash
for i in `cat ips.out`;do ping $i;done

What is it that is wrong with this method?
I mean I wouldn't normally put it in a script...but you know what I mean.

In this case, it doesn't matter all that much, but it's an inefficient method. It uses cat (an external command, and therefore slow) unnecessarily, and causes extra work for the shell in splitting the output of cat into separate arguments.

However, if any of the lines contained spaces, it would also split the line and $i would be assigned each word separately.
 

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LEARN ABOUT DEBIAN

rlm_ippool_tool

RLM_IPPOOL_TOOL(8)					      System Manager's Manual						RLM_IPPOOL_TOOL(8)

NAME

       rlm_ippool_tool - dump the contents of the FreeRadius ippool database files

SYNOPSIS

       If an ipaddress is specified then that address is used to limit the actions or output.

       rlm_ippool_tool [-a] [-c] [-o] [-v] session-db index-db [ipaddress]

       Mark the entry nasIP/nasPort as having ipaddress

       rlm_ippool_tool -n session-db index-db ipaddress nasIP nasPort

       Update old format database to new.

       rlm_ippool_tool -u session-db new-session-db

DESCRIPTION

       rlm_ippool_tool dumps the contents of the FreeRADIUS ippool databases for analyses or for removal of active (stuck?) entries.

       Or with the -n argument adds a usage entry to the FreeRADIUS ippool databases.

OPTIONS

       -a     Print all active entries.

       -c     Report number of active entries.

       -r     Remove active entries.

       -v     Verbose report of all entries.

       -o     Assume old database format (nas/port pair, not md5 output).

       -n     Mark the entry nasIP/nasPort as having ipaddress.

       -u     Update old format database to new.

EXAMPLES

       Given the syntax in the FreeRadius radiusd.conf:

	       ippool myippool {
		   range-start = 192.168.1.0
		   range-stop = 192.168.1.255
		   [...]
		   session-db = ${raddbdir}/ip-pool.db
		   ip-index = ${raddbdir}/ip-index.db
	       }

       To see the number of active entries in this pool, use:

	       $ rlm_ippool_tool -c ip-pool.db ip-index.db
	       13

       To see all active entries in this pool, use:

	       $ rlm_ippool_tool -a ip-pool.db ip-index.db
	       192.168.1.5
	       192.168.1.82
	       192.168.1.244
	       192.168.1.57
	       192.168.1.120
	       192.168.1.27
	       [...]

       To see all information about the active entries in the use, use:

	       $ rlm_ippool_tool -av ip-pool.db ip-index.db
	       NAS:172.16.1.1 port:0x2e8 - ipaddr:192.168.1.5 active:1 cli:0 num:1
	       NAS:172.16.1.1 port:0x17c - ipaddr:192.168.1.82 active:1 cli:0 num:1
	       NAS:172.16.1.1 port:0x106 - ipaddr:192.168.1.244 active:1 cli:0 num:1
	       NAS:172.16.1.1 port:0x157 - ipaddr:192.168.1.57 active:1 cli:0 num:1
	       NAS:172.16.1.1 port:0x2d8 - ipaddr:192.168.1.120 active:1 cli:0 num:1
	       NAS:172.16.1.1 port:0x162 - ipaddr:192.168.1.27 active:1 cli:0 num:1
	       [...]

       To see only information of one entry, use:

	       $ rlm_ippool_tool -v ip-pool.db ip-index.db 192.168.1.1
	       NAS:172.16.1.1 port:0x90 - ipaddr:192.168.1.1 active:0 cli:0 num:0

       To add an IP address usage entry, use:

	       $ rlm_ippool_tool -n ip-pool.db ip-index.db 192.168.1.1 172.16.1.1 0x90
	       rlm_ippool_tool: Allocating ip to nas/port: 172.16.1.1/144
	       rlm_ippool_tool: num: 1
	       rlm_ippool_tool: Allocated ip 192.168.1.1 to client on nas 172.16.1.1,port 144

SEE ALSO

       radiusd(8)

AUTHORS

       Currently   part   of   the   FreeRADIUS   Project   (http://www.freeradius.org)   Originally   by   Edwin   Groothuis,	 edwin@mavetju.org
       (http://www.mavetju.org)

       Mailing list details are at http://www.freeradius.org/

																RLM_IPPOOL_TOOL(8)
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