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Full Discussion: Sed command - help me understand
Top Forums Shell Programming and Scripting Sed command - help me understand Post 302317575 by devtakh on Tuesday 19th of May 2009 10:43:44 AM
Old 05-19-2009
1. This will give the current time minus 1 min in the form of hh:mm
Code:
date +%R -d "-1 min"

This will print the lines begining (line that matches the above hh:mm time) till the end of the line for the file req.txt

Code:
sed -n "/ $(date +\%R -d "-1 min")/,$"p req.txt

This will count the no of lines returned
Code:
 wc -l

so
Code:
sed -n "/ $(date +\%R -d "-1 min")/,$"p req.txt| wc -l

will o/p no of lines.

2. This will print lines between the lines that matches 19:00 and till 22:00
Code:
awk '/19:00/,/22:00/' app.log

From the above lines, it will filter only the lines that contain the string mytesturl

Code:
awk '/19:00/,/22:00/' app.log |grep "mytesturl"

From the returned lines, this will print field no 1,6 and 10 only which are comma seperated
Code:
awk '/19:00/,/22:00/' app.log |grep "mytesturl"|grep ',900,'|awk -F, '{print $1, $6, $10}'

This will print only field 2 from the above lines

Code:
awk '/19:00/,/22:00/' app.log |grep "mytesturl"|grep ',900,'|awk -F, '{print $1, $6, $10}' | awk '{print $2}'

The sed command and sort and uniq:
sed will look for string like :hh.mmm and replace with nothing and its o/p is sorted and then count on the uniq values
 

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LEARN ABOUT OSX

locale::codes::langfam

Locale::Codes::LangFam(3pm)				 Perl Programmers Reference Guide			       Locale::Codes::LangFam(3pm)

NAME

       Locale::Codes::LangFam - standard codes for language extension identification

SYNOPSIS

	  use Locale::Codes::LangFam;

	  $lext = code2langfam('apa');		       # $lext gets 'Apache languages'
	  $code = langfam2code('Apache languages');    # $code gets 'apa'

	  @codes   = all_langfam_codes();
	  @names   = all_langfam_names();

DESCRIPTION

       The "Locale::Codes::LangFam" module provides access to standard codes used for identifying language families, such as those as defined in
       ISO 639-5.

       Most of the routines take an optional additional argument which specifies the code set to use. If not specified, the default ISO 639-5
       language family codes will be used.

SUPPORTED CODE SETS

       There are several different code sets you can use for identifying language families. A code set may be specified using either a name, or a
       constant that is automatically exported by this module.

       For example, the two are equivalent:

	  $lext = code2langfam('apa','alpha');
	  $lext = code2langfam('apa',LOCALE_LANGFAM_ALPHA);

       The codesets currently supported are:

       alpha
	   This is the set of three-letter (lowercase) codes from ISO 639-5 such as 'apa' for Apache languages.

	   This is the default code set.

ROUTINES

       code2langfam ( CODE [,CODESET] )
       langfam2code ( NAME [,CODESET] )
       langfam_code2code ( CODE ,CODESET ,CODESET2 )
       all_langfam_codes ( [CODESET] )
       all_langfam_names ( [CODESET] )
       Locale::Codes::LangFam::rename_langfam  ( CODE ,NEW_NAME [,CODESET] )
       Locale::Codes::LangFam::add_langfam  ( CODE ,NAME [,CODESET] )
       Locale::Codes::LangFam::delete_langfam  ( CODE [,CODESET] )
       Locale::Codes::LangFam::add_langfam_alias  ( NAME ,NEW_NAME )
       Locale::Codes::LangFam::delete_langfam_alias  ( NAME )
       Locale::Codes::LangFam::rename_langfam_code  ( CODE ,NEW_CODE [,CODESET] )
       Locale::Codes::LangFam::add_langfam_code_alias  ( CODE ,NEW_CODE [,CODESET] )
       Locale::Codes::LangFam::delete_langfam_code_alias  ( CODE [,CODESET] )
	   These routines are all documented in the Locale::Codes::API man page.

SEE ALSO

       Locale::Codes
	   The Locale-Codes distribution.

       Locale::Codes::API
	   The list of functions supported by this module.

       http://www.loc.gov/standards/iso639-5/id.php
	   ISO 639-5 .

AUTHOR

       See Locale::Codes for full author history.

       Currently maintained by Sullivan Beck (sbeck@cpan.org).

COPYRIGHT

	  Copyright (c) 2011-2012 Sullivan Beck

       This module is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

perl v5.16.2							    2012-10-11					       Locale::Codes::LangFam(3pm)
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