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UNIX for Dummies Questions & Answers
understanding sed command
Post 302572525 by forroughuse on Thursday 10th of November 2011 08:22:53 AM
11-10-2011
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Guys,
I am trying to understand the sed command here.
adx001 $ a=/clocal/dctrdata/user/dctrdat1/trdroot/recouncil
adx001 $ b=`echo $a | sed 's/\//\\\\\//g'`
adx001 $ echo $b
\/clocal\/dctrdata\/user\/dctrdat1\/trdroot\/recouncil
The sed command i took it from the script.
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I have the following line of code that works wonders. I just don't completely understand it as I am just starting to learn regex. Can you help me understand exactly what is happening here?
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Hi,
can some one suggest me,how "sed" is managed to delete the second field here.
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sed 's/^\(*\)::/\1::/' /etc/passwd
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Hi Guys,
Could you please kindly explain what exactly the below SED command will do ?
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sed 's/*$/ /'
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LEARN ABOUT DEBIAN
sql::reservedwords::oracle
SQL::ReservedWords::Oracle(3pm) User Contributed Perl Documentation SQL::ReservedWords::Oracle(3pm) NAME
SQL::ReservedWords::Oracle - Reserved SQL words by Oracle SYNOPSIS
if ( SQL::ReservedWords::Oracle->is_reserved( $word ) ) { print "$word is a reserved Oracle word!"; } DESCRIPTION
Determine if words are reserved by Oracle Database. METHODS
is_reserved( $word ) Returns a boolean indicating if $word is reserved by either Oracle7, Oracle8i, Oracle9i or Oracle10g. is_reserved_by_oracle7( $word ) Returns a boolean indicating if $word is reserved by Oracle7. is_reserved_by_oracle8( $word ) Returns a boolean indicating if $word is reserved by Oracle8i. is_reserved_by_oracle9( $word ) Returns a boolean indicating if $word is reserved by Oracle9i. is_reserved_by_oracle10( $word ) Returns a boolean indicating if $word is reserved by Oracle10g. reserved_by( $word ) Returns a list with Oracle versions that reserves $word. words Returns a list with all reserved words. EXPORTS
Nothing by default. Following subroutines can be exported: is_reserved is_reserved_by_oracle7 is_reserved_by_oracle8 is_reserved_by_oracle9 is_reserved_by_oracle10 reserved_by words SEE ALSO
SQL::ReservedWords <http://www.oracle.com/technology/documentation/> AUTHOR
Christian Hansen "chansen@cpan.org" COPYRIGHT
This program is free software, you can redistribute it and/or modify it under the same terms as Perl itself. perl v5.8.8 2008-03-28 SQL::ReservedWords::Oracle(3pm)