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Top Forums Shell Programming and Scripting How to match (whitespace digits whitespace) sequence? Post 302454687 by shahanali on Sunday 19th of September 2010 08:38:49 PM
Old 09-19-2010
How to match (whitespace digits whitespace) sequence?

Hi

Following is an example line.

Code:
echo "192.22.22.22 [23ddddd] \"33dffwef\" 200 300 dsdsd"  | sed "s:\(\ [0-9]*\ \):\1:"

I want it's output to be

200

However this is not the case. Can you tell me how to do it? I don't want to use AWK for this. Secondly, how can i fetch just 300? Should I use "\2" for that?

When i use the following code
Code:
echo "192.22.22.22 [23ddddd] \"33dffwef\" 200 300 dsdsd"  | sed "s:\(\ [0-9]*\ \):TEST:"

200 gets replaced by TEST. If it can MATCH 200, why is it not showing it?

Thanks in advance.
 

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HOSTS(5)							File Formats Manual							  HOSTS(5)

NAME
hosts - hostname to IP address database SYNOPSIS
/etc/hosts DESCRIPTION
The hosts database lists the IP addresses and the hostnames that translate to these IP addresses. It is used by nonamed(8) in a network without name servers. A simple /etc/hosts may look like this: 127.0.0.1 localhost 192.9.200.1 darask 192.9.200.2 burask The localhost entry lists a special address that refers to the local host itself (a kind of /dev/tty for hosts.) You should only list it if nonamed needs it! The other entries are actual machines. The file may contain comments marked with '#'. You can have aliases (more hostnames on the same line), but it is not recommended, because nonamed can't present them to the system as CNAME records. An often seen form like 192.9.200.1 darask.home.cs.vu.nl darask is harmless though, and has the small advantage that you can use the short name in /etc/ethers so rarpd can match it at boot time. FILES
/etc/hosts Hosts database. SEE ALSO
ethers(5), nonamed(8), rarpd(8), boot(8). AUTHOR
Kees J. Bot (kjb@cs.vu.nl) HOSTS(5)
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