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Operating Systems Linux Red Hat Need help with a shell script for finding a certain pattern from log file Post 302494688 by Franklin52 on Tuesday 8th of February 2011 05:23:17 AM
Old 02-08-2011
Code:
sed -n 's!.*service=\(http://[^:]*\):.*!1!p' logfile > newfile

You can use a saved substring with \(.*\) which can be recalled with \1

Code:
\(http://[^:]*\)

This substring contains the part after "service=" and it starts with "http://".

[^:]* means characters that doesn't contain any colons.

:.* after the substring is the next semicolon and the rest of the line.

Here you can find some tutorial links:

https://www.unix.com/answers-frequent...tutorials.html

An excellent book for sed and awk:

http://oreilly.com/catalog/9781565922259
 

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URI::URL(3)						User Contributed Perl Documentation					       URI::URL(3)

NAME
URI::URL - Uniform Resource Locators SYNOPSIS
$u1 = URI::URL->new($str, $base); $u2 = $u1->abs; DESCRIPTION
This module is provided for backwards compatibility with modules that depend on the interface provided by the "URI::URL" class that used to be distributed with the libwww-perl library. The following differences exist compared to the "URI" class interface: o The URI::URL module exports the url() function as an alternate constructor interface. o The constructor takes an optional $base argument. The "URI::URL" class is a subclass of "URI::WithBase". o The URI::URL->newlocal class method is the same as URI::file->new_abs. o URI::URL::strict(1) o $url->print_on method o $url->crack method o $url->full_path: same as ($uri->abs_path || "/") o $url->netloc: same as $uri->authority o $url->epath, $url->equery: same as $uri->path, $uri->query o $url->path and $url->query pass unescaped strings. o $url->path_components: same as $uri->path_segments (if you don't consider path segment parameters) o $url->params and $url->eparams methods o $url->base method. See URI::WithBase. o $url->abs and $url->rel have an optional $base argument. See URI::WithBase. o $url->frag: same as $uri->fragment o $url->keywords: same as $uri->query_keywords o $url->localpath and friends map to $uri->file. o $url->address and $url->encoded822addr: same as $uri->to for mailto URI o $url->groupart method for news URI o $url->article: same as $uri->message SEE ALSO
URI, URI::WithBase COPYRIGHT
Copyright 1998-2000 Gisle Aas. perl v5.12.1 2008-04-04 URI::URL(3)
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